Snap fasteners for bags and cases are a quick, strong and neat closure for flaps, wallets, pouches, phone cases and glasses cases. Unlike clothing, a bag snap may be opened and closed dozens of times a day, and the materials are often leather, faux leather, canvas or heavy textile. Here is how to choose a model that looks good and lasts.
Which systems work best
- Four-part ring-spring ("61 system") snaps – the strongest hold, ideal for bag flaps, backpacks and tool cases.
- Spring snaps – a softer click, comfortable on wallets and small cases you open often.
- Mini snaps, 6.8–11 mm – for straps, key cases, bracelets and small pouches.
- Sew-on snaps – for textile cases and linings where you do not want to pierce the outer face.
Snap buttons E-2322 Gun Metal 40 mm – 4 pieces, Wavy design, Luxury model
Snap fasteners E-2278 Gun Metal 40 mm – 4 pieces, "Teardrop" design, Luxury model
Snap fasteners E-1555 Gun Metal 17 mm – 4 pieces, Luxury designer buttonsSize by item
| Item | Size |
|---|---|
| Key case, strap, bracelet | 8–11 mm |
| Wallet, phone or glasses case | 10–12.5 mm |
| Wash bag, clutch, small bag | 12.5–15 mm |
| Bag flap, backpack | 15–20 mm |
| Canvas covers and cases | 20–21 mm |
| Statement detail on a large bag | 25–40 mm |
Fitting snaps in leather and canvas
- Punch a hole slightly smaller than the post – leather stretches and grips the snap tightly.
- Check the post length – for thick leather (over 2–3 mm) choose a model with a longer post, or the snap will not close.
- Reinforce thin materials – on faux leather and light fabric, add a scrap of leather, interfacing or a plastic washer on the inside.
- Set on a hard surface with the matching dies so the decorative cap does not get distorted.
Design and matching hardware
The snap is a visible detail, so match it with the rest of the hardware – rings, buckles, rivets and the zip. Gunmetal and antique silver go well with brown and black leather, gold tones with light and beige materials. For eye-catching designs, look at the large 25 and 40 mm designer snaps with embossed patterns.
- Flat caps are easier to clean and do not snag in pockets.
- Domed caps look fuller and more classic.
- Black oxide is discreet and does not show fingerprints.
Care and durability
Bags and cases are used every day, so the snap has to survive a lot of opening and closing. To make it last, open the flap by holding the fabric or leather as close to the snap as possible rather than tugging the edge of the flap – that way you do not strain the hole. Keep metal snaps dry and wipe them with a soft cloth. If a snap starts opening too easily, replace it in good time before it tears the material.
If you make bags in larger numbers, keep a small stock of snaps from the same batch so colour and size match when a repair is needed. For bags that will carry heavy loads, choose a ring-spring snap in 15–20 mm rather than a mini model.
Frequently asked questions
Snap fastener or magnetic clasp for a bag?
A snap is thinner, cheaper and has no effect on cards or phones, while a magnet is easier to open one-handed. For wallets, snaps are the more common choice.
Will a snap hold on faux leather?
Yes, if you reinforce it from the inside. Without reinforcement, faux leather can tear around the post.
Can I add a snap to a finished bag?
Yes, as long as you can reach the inside. Sometimes you need to unpick the lining and stitch it back afterwards.
Browse the snap fasteners at Bul-tex and finish your bag with matching rivets and hardware.
