Find Your Perfect Fit:
A Guide to find your Extender Button Sizes
Do you ever feel like your favorite shirt is just a little too snug around the neck? At COCHIC, we believe style should never come at the cost of comfort. That’s where our collar extenders come in – the discreet, elegant solution to enhance your fit without compromising your look.
But which size should you choose? Let us guide you through our button sizing options: 16L, 18L, 20L, and 24L.
Understanding Button Sizes
Collar button sizes are measured in ligne (L) – a traditional unit used in tailoring.
- Measure the collar button on your shirt with a caliper or ruler.
- Match the diameter to your available collar extender sizes (ex: if your collar button has a diameter of 11.5 mm → then choose extender for 18L).
And yes! We make your life easier!
Always note: the button size may vary even within the same brand depending on the style (e.g., casual vs formal).
Often found in luxury or European brands for men's shirts.
16L
18L to 20L are the most common sizes for collar buttons in mass-market men’s shirts.
18L
24L: Occasionally for very bold or decorative collars. More commonly used on pants.
20L
