Manufacturer · Fashion & Home Accessories
When choosing wire hook and eye sizes, you look at two things: the thickness of the wire and the length of the hook. The finest sets are for lingerie, silk and chiffon, the medium ones for dresses, blouses and skirts, and the larger ones for waistbands, dense wool fabrics and outerwear. The rule is simple: the thinner the fabric and the lower the strain, the smaller the hook you choose.
How wire hook and eye sizes are designated
Wire hooks have no single international numbering standard the way buttons have ligne. Each manufacturer uses its own numbering – for example No. 00, 0, 1, 2, 3 and up, with a higher number usually meaning a larger hook. So when ordering it is more reliable to give the actual parameters rather than just a number from another supplier:
- wire thickness in millimetres – it determines the strength and how much the hook will be felt through the fabric;
- hook length – from the base to the end of the curve;
- base width – the distance between the two sewing loops;
- type of eye – straight or round, because the eye also has a size and must fit the hook.
In the wire hooks and eyes category we stock sets in sizes from 0.6 to 2 mm, which covers almost all applications in womenswear and lingerie.
The three factors that determine the size
1. Thickness and weight of the fabric
On a fine fabric a large hook is heavy, pulls the fabric down and shows as a bump on the outside. On a dense fabric a small hook sinks into the material and is hard to fasten. Go by how many layers will be stitched through – main fabric, interfacing, lining – not just the fabric itself.
2. Load at the fastening point
Above the invisible zip of a fitted dress, the hook takes considerable strain when the wearer sits and bends. There it makes sense to choose a hook one number larger than for a loose neckline, where the fastening only holds the edges together.
3. Visibility
If the hook stays completely hidden under the overlap, the size is purely a matter of function. But if the eye is visible, for example on the back of a dress with an edge-to-edge closure, the smaller size looks more refined.
Chart: which size for which product
| Product and fabric | Recommended size | Note |
|---|---|---|
| Lingerie, bodysuit, silk, chiffon | Finest | Minimal weight, does not show through |
| Blouse, shirt in thin cotton or viscose | Fine | Usually a round eye at the neckline |
| Dress above an invisible zip | Medium | Takes the strain at the top of the zip |
| Skirt with a waistband in a light fabric | Medium | Straight eye with an overlap |
| Wool dress, suiting fabric | Medium to large | More layers in the stitching |
| Coat, cape, leather | Large | Often covered with thread in the colour of the fabric |
For waistbands of trousers and skirts in denim or suiting fabric, where the load is constant, a wire hook is usually not enough. There flat hooks and bars are used, which are stamped from strip rather than bent from wire.
How to measure a hook you already use
If you want to replace a hook from an existing style, measure it with a calliper:
- The wire thickness – on the straight part, not on the curve.
- The overall length – from the outer edge of the loops to the tip of the curve.
- The base width – between the outer edges of the two loops.
- The inner opening of the eye – it should be slightly larger than the wire thickness of the hook.
The surest option is to send us a physical sample together with a piece of the fabric. That way we can compare the size directly and suggest the closest model.
Hook number and compatibility with the eye
The hook and eye are sold as a set because they only work as a pair. If you combine a hook of one size with an eye of another, two problems arise: with an eye that is too large the fastening slips during movement, and with one that is too small the hook does not engage fully and deforms the wire. In series production always order sets of the same size and colour, even when buying the eyes separately as spares.
Common mistakes when choosing the size
- One size for the whole collection – convenient for the warehouse, but with a blouse and a coat from the same line the result is a compromise for both styles.
- Choosing from a photo alone – in photos sizes are misleading; ask for a sample.
- Ignoring the lining – with lining and interfacing the fabric becomes considerably thicker.
- Weak thread for a large hook – a larger hook takes more load and requires a strong polyester sewing thread.
- No reinforcement – even the right size will tear a thin fabric if the area is not interfaced.
Samples and test sewing
Before starting a run, sew two or three sizes onto a test piece of the real fabric with all its layers. Fasten and unfasten many times, sit down, bend over – and see whether the hook slips, whether it shows on the outside and whether the fabric around the loops puckers. This check takes minutes but saves reworking the whole batch.
Record the chosen size, colour and type of eye in the tech pack for the style. That way, with a repeat order or a change of factory, selection does not have to start from scratch, and each following season you will use a proven solution.
Choosing the size with Polkom's help
Polkom is a Bulgarian manufacturer and wholesale supplier of garment accessories based in Sofia, with over 30 years of experience. If you are not sure which size to choose, send us a description of the product, a sample of the fabric or the hook you currently use via the inquiry form. We will suggest the right size and colour and prepare samples if needed. Minimum quantities depend on the article.
