In this article
Common choices by product
| Product | Common type | Size | End type |
|---|---|---|---|
| Jeans | Metal | Size 4.5-5 | Closed-end |
| Dresses, skirts | Invisible coil | Size 2-3 | Closed-end |
| Sweatshirts | Coil | Size 3-5 | Open-end |
| Jackets | Coil, metal, molded | Size 5 | Open-end |
| Coats, parkas | Molded, coil, metal | Size 5-8 | Open-end |
| Bags | Coil, metal | Size 3-10 | Closed-end, X/O |
| Boots | Metal, coil | Size 5-10 | Closed-end |
| Luggage | Coil, molded | Size 8-10 | Two-way |
| Tents | Coil, molded | Size 3-8; heavy Size 10 | Two-way |
| Home textiles | Coil, chain | Size 3-5 | Closed-end, cut |
This table is a common starting point, not a fixed rule. Make the final decision with samples and testing.
A quick rule of thumb
- Visual quality, leather, straight lines: Metal
- Curves, flexibility, lightness: Nylon coil
- Outdoor use, coloured teeth: Molded plastic
- Hidden zipper: Invisible
Four questions to ask
- How thick is the fabric?
- Will the zipper carry a load?
- Will the product be washed or dyed?
- Will it be used outdoors or in salt water?
Starting points for more products
| Product | Type | Size | End and slider |
|---|---|---|---|
| Leather jacket | Metal | Size 5-10 | Open-end, auto-lock |
| Backpack | Coil | Size 5-10 | Closed-end, two sliders, non-locking |
| Tent, sleeping bag | Coil, molded | Size 3-8 | Two sliders, reversible slider |
| Covers, marine | Molded, coil | Size 5-10 | Chain, plastic slider |
| Pillows, bedding | Coil | Size 3-5 | Chain or closed-end |
| Workwear | Metal, molded | Size 5-10 | Open-end or closed-end |
Example: a long parka
The fabric is heavy, the coat gets washed and it is worn outdoors. Molded Size 8, open-end with two sliders is a good start. Opening from the bottom when seated is a real comfort. Then sew a sample onto your fabric and test it in washing. See the X and O guide and closed-end vs open-end.
