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Choosing the correct eyelet size is essential for a professional finish and optimal performance in any application — curtains, tarps, leather goods, footwear, signage or industrial work. In this complete guide we explain how to measure, what to consider when choosing and which size is right for each use.
What size of eyelet do I need?
There is no single answer — it depends on three factors:
- Fabric or material: Thickness and material density determine the eyelet barrel length.
- Use: What will pass through (rod, cord, screw, etc.) sets the inner diameter.
- Mechanical load: Tension or pulling force defines the outer diameter and required strength.
Key eyelet dimensions
Inner diameter (A)
The hole the eyelet creates. This is the most important measurement because it must fit what will pass through it. Common values:
- 4-6 mm: Footwear, leather goods, light textiles
- 8-12 mm: Shower curtains, banners, accessories
- 14-20 mm: Light awnings, residential curtains
- 25-40 mm: Living-room curtains with rod, professional tarps
- 50+ mm: Industrial applications, marquees, decoration
Outer diameter (B)
The visible part of the eyelet. Determines the support area on the fabric and visual finish. Always larger than the inner diameter, usually by 2-8 mm depending on the model.
Eyelet height or barrel (C)
The depth of the cylindrical part that goes through the fabric. Must be at least equal to the fabric thickness:
- 2-4 mm: Thin fabrics, leather, single-layer textiles
- 5-8 mm: Standard textiles, double layers, hemmed fabrics
- 10+ mm: Thick fabrics, reinforced tarps, multi-layered materials
How to measure eyelet sizes
Measuring an existing eyelet
- With a digital calliper, measure the inner diameter (smaller circle).
- Measure the outer diameter (visible ring).
- Measure barrel height with the fabric.
- Note all measurements to find an exact match.
Measuring for a new project
- Identify what will pass through: rod, cord, ring, screw, etc.
- Measure that element’s diameter and add 2-3 mm of clearance.
- Measure fabric thickness at the eyelet location (include hems if any).
- Estimate the load the eyelet must bear.
Reference table
| Application | Inner Ø (A) | Outer Ø (B) | Height (C) |
|---|---|---|---|
| Footwear and small leather goods | 4-5 mm | 8-10 mm | 3-5 mm |
| Belts and bags | 5-8 mm | 10-14 mm | 4-6 mm |
| Shower curtains | 10-12 mm | 15-18 mm | 4-6 mm |
| Light banners | 10-14 mm | 15-22 mm | 5-7 mm |
| Residential awnings | 14-20 mm | 22-30 mm | 6-10 mm |
| Living-room curtains | 25-40 mm | 35-55 mm | 5-8 mm |
| Truck tarps | 16-20 mm | 25-32 mm | 8-12 mm |
| Marquees / industrial | 40-60 mm | 55-80 mm | 10-15 mm |
DIN standard eyelets
European DIN 7332 standardises eyelet dimensions and tolerances. Working with DIN eyelets guarantees:
- Compatibility with standard tools and machines
- Predictable mechanical strength
- Easy spare parts replacement
- Quality compliance in industrial projects
Common mistakes when choosing size
- Going too small to save money: An undersized eyelet will deform and pull out.
- Ignoring fabric thickness: A short barrel does not properly grip thick fabric.
- Not accounting for hems: Hems add thickness — measure with the hem in place.
- Choosing only by visual diameter: Visual size doesn’t always match what your tool requires.
Need help choosing the right size?
At Industria Acosta Pramon we offer a complete catalogue of eyelet sizes in brass, steel, stainless steel and aluminium. Contact our technical team for personalised advice and free samples to verify the fit before placing your order.
