Dress Shirt Collar Size Guide
Our collar size calculator helps you find the perfect dress shirt collar size based on neck circumference and fit preferences. Essential for buying dress shirts online and ensuring comfortable, professional fit.
How Collar Sizing Works
Collar sizes are based on neck circumference measured at the base of the neck. US/UK sizes use inches (14, 14.5, 15, 15.5, 16, etc.), while EU sizes use centimeters (36, 37, 38, 39, 40, etc.). Proper fit allows one finger to fit between the collar and neck when buttoned.
Collar Size Formula
Measure neck circumference at the base where the collar sits, then add 0.5 inch (1.25 cm) for comfort. Round to nearest half inch or whole cm.
Example:
Neck measures 15 inches: 15 + 0.5 = 15.5 inch collar size. Or 38 cm neck + 1.25 cm = 39.25 cm, round to 39 cm.
Common Use Cases
Real-world applications for this calculator
Online Shirt Shopping
Order correctly sized dress shirts from international retailers like Charles Tyrwhitt, Brooks Brothers, or TM Lewin.
Professional Attire
Ensure proper fit for business, formal events, or uniform requirements.
Gift Shopping
Calculate collar sizes when buying dress shirts as gifts.
Tips
- Measure with a finger under the tape for the right fit allowance.
- Size up if you frequently wear ties (they take up neck space).
- Consider shrinkage for 100% cotton shirts (may shrink 0.5 inch).
- Try shirts on with your typical tie and knot style if applicable.
Frequently Asked Questions
How do I measure my neck for collar size?
Wrap a measuring tape around the base of your neck where the collar would sit, just above the collarbone. Keep the tape snug but not tight. Add 0.5 inch for comfort, or measure with one finger inside the tape for proper fit.
How tight should a shirt collar be?
A properly fitted collar should allow you to comfortably fit one finger between the collar and your neck when the shirt is buttoned. You should be able to turn your head without the collar turning with it.
What are standard collar sizes for men?
Standard men's collar sizes typically range from 14.5 inches (37 cm) to 18 inches (46 cm), with 15.5-16.5 inches (39-42 cm) being most common. Sizes increase in 0.5 inch (1 cm) increments.
Should I size up if between collar sizes?
Yes, always size up if between sizes. A collar that's too tight is uncomfortable and can cause headaches. You can take in a slightly large shirt at the neck, but you can't let out a tight one.
What about collar styles and fits?
Different collar styles (spread, point, button-down, cutaway) fit slightly differently. Slim fit shirts may have smaller neck proportions than regular or classic fit shirts of the same collar size.