How to Add a Liner to a Crochet (or Knit) Bag – Free Tutorial
There’s something deeply satisfying about finishing a crochet or knit bag — the last stitch, the woven-in ends, the moment you hold it up and think, yes, that’s the one. But if you’ve ever carried a handmade bag for more than a few days, you know the small frustrations that creep in: your keys slip through the stitches, the bag stretches out of shape, or bits of fluff and crumbs nestle into every gap. Adding a fabric liner solves all of these problems at once, and it gives your finished project that polished, professional look that makes people ask, “Did you buy that?”
The good news is that lining a crochet or knit bag is much easier than it sounds. You don’t need to be a seamstress. You don’t need a sewing machine (though one helps). You don’t even need much fabric. What you do need is a little patience, a few basic supplies, and this step-by-step tutorial to walk you through the whole process from start to finish.
Whether you’re working with a small clutch, a roomy tote, a market bag, or a structured handbag, the method is essentially the same. Once you’ve done it once, you’ll want to line every bag you make going forward.
Why You Should Line Your Handmade Bag
Before we dive into the how, let’s talk about the why — because if you’ve never lined a bag before, you might be wondering whether it’s really worth the extra effort.
Structure and shape: Yarn is flexible by nature, which is wonderful for wearing and draping but can be a problem for bags. A fabric liner gives the bag a firmer foundation, helping it hold its shape even when it’s packed full.
Durability: The lining takes a lot of the daily wear and tear, protecting your knitting or crochet from friction against the contents. Heavy items like keys, phones, and water bottles are less likely to distort your stitches when there’s a layer of fabric absorbing the stress.
Small-item retention: Anyone who has ever watched their lip balm or earbuds fall straight through an open mesh crochet bag knows this pain. A solid lining keeps everything inside where it belongs.
A polished finish: A well-sewn lining covers any imperfections on the inside of your bag — the wrong-side floats, the color changes, the slightly uneven tension. It makes the bag look intentional and complete.
Easier cleaning: Many lining fabrics are easier to spot-clean than yarn, and some are even machine washable. If your bag takes a coffee spill, you’ll be grateful for that fabric barrier.
What You’ll Need
Here’s a list of supplies to gather before you start. Most of these are inexpensive and easy to find at any fabric or craft store.
Fabric: Cotton quilting fabric is the most popular choice because it’s sturdy, comes in thousands of prints and solids, and behaves predictably when you sew it. Canvas and denim work beautifully for structured totes. Silk or satin adds a luxurious touch to evening bags and clutches. For bags that will carry heavy items, a medium-weight woven fabric or even a canvas interfacing-backed cotton is ideal. Choose a color or print that complements your yarn — either a cheerful contrast or a tone-on-tone match both look intentional and lovely.
Scissors or a rotary cutter and cutting mat: Fabric scissors (not your paper scissors, please) or a rotary cutter will give you the cleanest cuts. Clean cuts make sewing easier and the finished lining more precise.
A ruler or measuring tape: You’ll need accurate measurements of your bag’s interior to cut the fabric correctly.
Sewing pins or clips: To hold your fabric in place while you sew.
A sewing machine or needle and thread: A sewing machine will make this project go much faster and produce sturdier seams, but hand sewing works fine, especially for smaller bags or bags with delicate construction. If hand sewing, use a backstitch for strength.
An iron: Pressing your fabric before cutting and pressing seams open after sewing makes a significant difference in the quality of your finished lining. Don’t skip this step.
Optional: interfacing: Fusible or sew-in interfacing can add structure to your lining fabric, which is particularly useful if your chosen fabric is thin or if you want a more rigid bag.
Optional: magnetic snap, zipper, or button: If you’d like the top of your bag to close, now is the perfect time to add a closure. Magnetic snaps are the easiest to install and work beautifully in handmade bags.
Step One: Measure Your Bag
The first and most important step is getting accurate measurements of the inside of your bag. Because knit and crochet fabrics stretch, measuring the inside (rather than the outside) gives you the most accurate dimensions for a liner that fits well without pulling or puckering.
Turn your bag inside out if possible and press it gently into the shape you want it to hold. Use your measuring tape to measure:
The width: Measure across the widest point of the inside of the bag.
The height: Measure from the base of the bag to the top edge where you’d like the lining to end. For most bags, this is right at the top opening.
The depth (or gusset): If your bag is flat (like a clutch), you won’t have a gusset. If it has a flat bottom or side panels that give it a three-dimensional shape, measure the depth at its widest point.
Write these measurements down. You’ll be working with them throughout the project.
If your bag has an irregular shape — tapered sides, a curved bottom, a flap — you can make a paper template by holding a piece of newspaper or craft paper inside the bag and tracing the shape. This is more effort upfront but gives you a much better-fitting liner for complex shapes.
Step Two: Cut Your Fabric
For a simple rectangular bag, you’ll cut two pieces of fabric for the front and back panels, and one or two pieces for the base if the bag has a gusset.
For the front and back panels: Add a half-inch seam allowance to each side and the bottom of your measurements. Add about one full inch to the top measurement so you’ll have fabric to fold over and attach to the bag’s top edge cleanly.
So if your bag’s interior measures 12 inches wide by 14 inches tall, you’d cut each panel at 13 inches wide by 15 inches tall.
For the base: If your bag has a flat bottom, measure the interior base and add a half-inch seam allowance on all sides. Cut one piece in this shape.
For a gusset on the sides: If your bag is three-dimensional with side panels, cut those as well, adding seam allowance on all sides.
Before you cut, iron your fabric. Wrinkles can throw off your measurements and make the final liner look untidy.
If you’re using interfacing, cut it to the same size as your fabric pieces (minus the seam allowance) and fuse or baste it to the wrong side of the fabric before sewing.
Step Three: Sew the Lining
With your pieces cut and pressed, it’s time to sew the lining together into a bag shape.
Pin the front and back panels together with the right sides of the fabric facing each other (right sides together, or RST as sewers abbreviate it). Sew down each side and across the bottom, leaving a half-inch seam allowance. If you’re using a sewing machine, a straight stitch at a medium length works well for most cotton fabrics.
Press the seams open with your iron. This reduces bulk at the corners and gives your lining a crisper look.
If your bag has a flat bottom with a gusset: After sewing the side seams, pinch each bottom corner so that the side seam and the bottom seam align on top of each other, forming a triangle of fabric. Pin the corner flat, then measure from the point of the triangle to the place you want to sew — the measurement should be half the depth of your bag. Sew across the triangle, then trim the excess fabric leaving about a quarter inch. This technique is called boxing the corners, and it creates a flat bottom and dimensional shape without needing to cut and sew a separate base panel.
Alternatively, attach a separate base panel: If you cut a separate base, pin it to the bottom opening of the tube you’ve sewn, right sides together, matching corners. Sew all the way around, clipping the corners to ease the fabric. Press the seams.
Once sewn, your lining should look like a fabric bag. It won’t look polished yet — the raw edges will be at the top and the right side of the fabric will be hidden inside — but that’s exactly right for this stage.
Step Four: Add Any Pockets or Closures (Optional)
Before you insert the lining into your bag, this is the moment to add any interior features you want. Unpicking stitches once the lining is inside the bag is frustrating, so now is the time.
Interior pockets: A simple slip pocket is just a rectangle of fabric hemmed on all sides (or folded in half for a cleaner finish), then stitched to the inside of one of your lining panels. For a phone, a five-by-eight-inch pocket is a good size. For a divided pocket with sections for cards or pens, sew vertical lines across the pocket after attaching it to the lining.
Magnetic snaps: These are installed in pairs. Mark the spot where you want each half of the snap — usually centered on the front and back panels near the top of the lining, about an inch below the folded edge. Reinforce the spot with a small square of interfacing on the wrong side of the fabric. Following the snap’s packaging instructions, use the included backing plate, push the prongs through the fabric and interfacing, and fold the prongs over the plate. Repeat for the second half. Test the snap before inserting the lining.
Zippers: Inserting a zipper takes a bit more skill, but a basic zipper installation across the top opening of the lining is manageable even for relative beginners. There are many excellent video tutorials available if you’d like to try this step.
Step Five: Insert the Lining into the Bag
Now comes the satisfying part where everything comes together.
Leave your fabric lining inside out (so the wrong side of the fabric is facing you and the pretty printed or colored side is on the inside). Place it inside your crocheted or knitted bag. The wrong sides of both the lining and the bag should be facing each other.
Adjust the lining so it fits neatly — no bunching at the corners, no pulling at the sides. The top raw edge of the lining should sit just below the top edge of the bag, or at the height where you want it to end.
If the lining is too tall, you can either fold more fabric over at the top or trim it down. If it’s slightly short, you may be able to stretch it gently — knit and crochet bags have a bit of give, which works in your favor here.
Once the lining is positioned, fold the top raw edge of the lining fabric over toward the wrong side (toward the inside of your bag) by about half an inch or so. Press this fold with your fingers or a small iron if you can get inside the bag. Pin or clip the folded edge to the inside of the crochet or knit fabric all the way around the top.
Step Six: Sew the Lining to the Bag
This is the step that permanently joins the lining to your handmade bag, and it’s the one that most people find a little tricky at first — but it’s very doable.
By hand: Thread a needle with a thread color that matches either your lining fabric or your yarn (whichever is more visible) and use a slip stitch or a whipstitch to sew the folded edge of the lining to the inside of the bag’s top edge. Take small, even stitches and try to catch only a thread or two of the bag’s yarn on each stitch so the stitches aren’t visible from the outside. Work all the way around the opening until the lining is fully attached.
By machine: If your bag is wide enough to maneuver under a sewing machine foot, you can machine sew the lining in place using a topstitch just below the folded edge. This works best for large, flat bags like tote bags. It’s difficult for smaller bags or structured shapes.
Ladder stitch (also called mattress stitch): This is a hand sewing technique that creates an almost invisible seam and works extremely well for attaching linings. You alternate small horizontal stitches on either side of the join, then pull the thread taut to close the seam. The stitches disappear into the fold.
When you’re done sewing, check the lining from the outside of the bag. You shouldn’t see any stitches at all, or only minimal ones that blend into the texture of the yarn.
Step Seven: Press and Finish
Give the top edge of the bag a gentle pressing with a cool iron (check the care instructions for your yarn — wool, for instance, should be pressed with steam and very light pressure, while acrylic should not be ironed at all). This helps the lining sit neatly inside and encourages the top edge of the bag to look crisp and even.
Step back and look at your finished bag. The lining should be invisible from the outside, sitting smoothly inside without bunching or pulling. If there are any gaps or loose areas, go back and tack them down with a few hand stitches.
Tips for Success
A few extra notes from experience that can save you time and frustration:
Pre-wash your fabric before cutting it. Fabric can shrink in the wash, and if you add a lining that hasn’t been pre-washed, the first time you clean the bag you may end up with a lining that’s too small and causes the bag to pucker.
Choose a lining fabric that is colorfast. If your bag gets wet, you don’t want dye from the lining bleeding onto your yarn.
For very open-stitch crochet bags (like mesh market bags), consider sewing the lining fabric into a separate bag shape and then simply dropping it inside, attaching only at the handles or top edge rather than all the way around. This lets the lining function independently without the bag’s structure depending on the stitching.
For extra stability in bag bottoms, cut a piece of plastic canvas (available in most craft stores) to fit the base of your bag and slip it between the bottom of the bag and the lining before you sew the lining in place. This gives a firm, flat bottom that won’t sag.
Final Thoughts
Adding a lining to your crochet or knit bag is one of those techniques that transforms a handmade item from something casual and charming into something genuinely polished and practical. It takes an extra afternoon — maybe two if you’re new to sewing — but the result is a bag you’ll carry with pride and that will last for years rather than months.
Once you get comfortable with the basic technique, you can experiment with contrast linings in bold prints, add more sophisticated closures like frame clasps or turn locks, or play with different fabric weights to change the structure and feel of your bags. There are very few handmade bag problems that a good lining can’t help solve.
So dig into your fabric stash, pick something that makes you happy, and give your next handmade bag the finish it deserves.
