Manufacturer · Fashion & Home Accessories
When choosing wire hooks and eyes sizes, you focus on two things: wire thickness and hook length. The finest sets are for lingerie, silk, and chiffon; medium sizes suit dresses, blouses, and skirts; larger ones fit belts, thick wool fabrics, and outerwear. The rule is simple: the thinner the fabric and the less tension, the smaller the hook you select.
How wire hooks and eyes sizes are marked
Wire hooks do not have a unified international numbering standard like buttons with lignes. Each manufacturer uses their own system – for example, No. 00, 0, 1, 2, 3 and up, where a higher number usually means a larger hook. Therefore, when ordering, it is more reliable to specify actual measurements rather than just a number from another supplier:
- Wire thickness in millimetres – determines strength and how much the hook will be felt through the fabric;
- Hook length – from the base to the tip of the curve;
- Base width – distance between the two sewing loops;
- Eye type – straight or rounded, as it also has a size and must fit the hook.
In the wire hooks and eyes category, we stock sets ranging from 0.6 to 2 mm wire thickness, covering almost all applications in women's clothing and lingerie.
The three factors determining the size
1. Fabric thickness and weight
On delicate fabrics, a large hook feels heavy, pulls the fabric down, and shows as a lump outside. On thick fabric, a small hook sinks into the material and is hard to fasten. Consider how many layers will be sewn – main fabric, interfacing, lining – not just the fabric itself.
2. Stress at the fastening point
Above the concealed zip of a fitted dress, the hook endures significant tension when sitting or bending. It is wise to choose a hook one size larger here than for a loose neckline where the fastening only holds edges together.
3. Visibility
If the hook remains fully hidden under the overlap, size is only functional. But if the eye is visible, for example on a dress back with edge-to-edge closure, a smaller size looks more elegant.
Table: recommended sizes by product
| Product and Fabric | Recommended Size | Note |
|---|---|---|
| Lingerie, bodysuits, silk, chiffon | Finest | Minimal weight, does not show through |
| Blouse, shirt in thin cotton or viscose | Fine | Usually rounded eye at neckline |
| Dress above concealed zip | Medium | Handles tension at zip top |
| Skirt with belt in light fabric | Medium | Straight eye at overlap |
| Wool dress, suit fabric | Medium to large | More layers when sewing |
| Coat, cape, leather | Large | Often sewn with thread matching fabric colour |
For trouser and skirt belts made of denim or suit fabric, where stress is constant, wire hooks are usually insufficient. Flat hooks and bars stamped from strip are used instead of wire-bent hooks.
How to measure a hook you already use
If you want to replace a hook from an existing model, measure it with calipers:
- Wire thickness – on the straight part, not the curve.
- Total length – from the outer edge of the loops to the tip of the curve.
- Base width – between the outer edges of the two loops.
- Inner opening of the eye – it should be slightly larger than the wire thickness of the hook.
The safest option is to send us a physical sample along with a piece of fabric. This way, we can compare sizes directly and suggest the closest model.
Hook size and compatibility with the eye
Hooks and eyes 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 too large an eye, the fastening slips during movement; with too small an eye, the hook does not fully enter and deforms the wire. For serial production, always order sets of the same size and colour, even when buying spare eyes separately.
Common mistakes when choosing size
- One size for the entire collection – convenient for stock, but for both blouse and coat from the same line, the result is a compromise.
- Choosing by photo only – sizes are misleading in photos; request a sample.
- Ignoring the lining – lining and interfacing significantly increase fabric thickness.
- Weak thread for large hooks – bigger hooks bear more load and require strong polyester sewing thread.
- Lack of reinforcement – even the right size will tear thin fabric if the area is not reinforced with fusible interfacing.
Samples and test sewing
Before starting production, sew two or three sizes on a test piece of the actual fabric with all layers. Fasten and unfasten repeatedly, sit down, bend over – check if the hook slips, shows through outside, or if fabric gathers around the loops. This test takes minutes but saves rework of the entire batch.
Record the chosen size, colour, and eye type in the model’s technical sheet. This way, for repeat orders or factory changes, you won’t have to start selection from scratch, and each new season you will use a proven solution.
Size selection assistance from Polkom
Polkom is a Bulgarian manufacturer of accessories for fashion, furniture, footwear, and bags, based in Sofia with over 30 years of experience. If you are unsure which size to choose, send us a product description, fabric sample, or the hook you currently use via the inquiry form. We will suggest the right size and colour and prepare samples if needed. Minimum order quantities depend on the item.
