ganak.appShirt Size Calculator
Free shirt size calculator for men and women. Enter neck, chest, and sleeve measurements or use height and weight to find your dress shirt size, t-shirt size, and international equivalents in US, UK, and EU systems. Includes fit preference, between-size guidance, and complete size charts.
Measure neck at the base, just above the collar bone. Chest at the fullest point under your arms. Sleeve from the center back of your neck, across the shoulder, down to the wrist bone.
M (Casual) · 15.5 / 34 (Dress)
Your neck measurement matches a 15.5" dress shirt (M).
Dress Shirt Size
Formal/dress shirt sizing by neck and sleeve
Neck (US/UK)
15.5"
Neck (EU)
39
Sleeve
34"
Alpha
M
T-Shirt / Casual Size
Based on chest measurement (regular fit)
Size
M
Numeric
40
Measurements Used
The values used to determine your shirt size
Neck
15.5"
Chest
40"
Sleeve
34"
Men's Dress Shirt Size Chart
Dress shirt sizes by neck measurement (US/UK and EU)
| US/UK | EU | Size | Chest Range |
|---|---|---|---|
| 14" | 36 | XS | 33" – 34" |
| 14.5" | 37 | S | 34" – 36" |
| 15" | 38 | S/M | 36" – 38" |
| 15.5" | 39 | M | 38" – 40" |
| 16" | 41 | M/L | 40" – 42" |
| 16.5" | 42 | L | 42" – 44" |
| 17" | 43 | L/XL | 44" – 46" |
| 17.5" | 44 | XL | 46" – 48" |
| 18" | 46 | XL | 48" – 50" |
| 18.5" | 47 | 2XL | 50" – 52" |
| 19" | 48 | 2XL | 52" – 54" |
Men's Casual / T-Shirt Size Chart
T-shirt and casual shirt sizes by chest measurement
| Size | Chest Range |
|---|---|
| XS | 30" – 34" |
| S | 34" – 38" |
| M | 38" – 42" |
| L | 42" – 46" |
| XL | 46" – 50" |
| 2XL | 50" – 54" |
| 3XL | 54" – 58" |
How Shirt Sizes Work
Understanding the different shirt sizing systems
Shirt sizing uses two different systems depending on the type of shirt. Dress shirts use a precise neck and sleeve measurement (e.g., 15.5/34), while casual shirts and t-shirts use alpha sizing (S, M, L, XL) based on chest measurements. Women's shirts are typically sized by bust measurement and mapped to US numeric sizes (0–22) or alpha sizes.
International sizing varies. For men's dress shirts, US and UK sizes are the same (neck in inches), while EU sizes use neck circumference in centimeters. For women's shirts, this calculator converts between US, UK, and EU numeric sizes.
Neck
Dress Shirts
Measured at the base of the neck where the collar sits
Chest/Bust
Casual & Women's
Measured at the fullest point to determine alpha size
Sleeve
Dress Shirts
Center back of neck to wrist for dress shirt sleeve length
How to Take Accurate Measurements
Step-by-step measurement guide for finding your shirt size
1. Neck (Men's Dress Shirts)
Place the tape at the base of your neck where a collar would sit. Wrap it around comfortably — you should be able to fit two fingers between the tape and your neck. Enter your exact measurement; the calculator rounds to the nearest half inch.
2. Chest (T-Shirts & Casual)
Wrap the tape around the fullest part of your chest, just under the armpits. Keep it level and snug but not tight. This measurement determines your alpha size (S, M, L, XL).
3. Sleeve Length
Bend your arm slightly. Have someone measure from the center back of your neck, across the shoulder point, down the outside of the arm to the wrist bone. Round to the nearest inch.
4. Tips for Accuracy
Measure over a light t-shirt, not a thick sweater. Stand straight with arms at sides. Have a friend help with sleeve and back measurements. Measure twice for consistency.
Dress Shirts vs Casual Shirts
Understanding the two main shirt sizing systems
Men's shirts use two completely different sizing systems depending on the formality of the garment. Understanding the difference is essential for getting the right fit.
Dress Shirts (Neck/Sleeve)
Dress shirts are sized by two measurements: neck circumference and sleeve length. A size like "15.5 / 34" means a 15.5-inch neck and 34-inch sleeve. This precise sizing allows for a tailored collar and sleeve fit.
Casual / T-Shirts (Alpha)
T-shirts and casual shirts use alpha sizes (S, M, L, XL) based on chest measurement. These sizes are less precise and vary between brands. A Medium typically fits a 38–41 inch chest.
Women's Shirts (US Numeric)
Women's shirts are sized by bust measurement, mapped to US numeric sizes (0–22) or alpha sizes (XXS–3XL). International equivalents differ: a US 8 is a UK 12 and an EU 38.
Fit Preference Matters
The same measurements can yield different sizes depending on fit preference. Slim fit runs tighter with less ease, while relaxed fit adds extra room. Always consider how you want the shirt to drape.
Common Shirt Sizing Mistakes
Avoid these pitfalls when determining your shirt size
Measuring the neck too tight
A common mistake is wrapping the tape snugly around the neck like a choker. You should be able to fit two fingers between the tape and your neck. A too-tight neck measurement leads to uncomfortable collars.
Using dress shirt size for t-shirts
Dress shirt sizes (e.g., 15.5/34) and t-shirt sizes (S/M/L) are completely different systems. A size 16 neck doesn't mean you're a Large in t-shirts — it depends on your chest measurement.
Ignoring brand variation
Alpha sizes (S, M, L) vary significantly between brands. A Medium from one brand may fit like a Large from another. Always check the specific brand's size chart and use your actual measurements for comparison.
Not accounting for fit preference
A slim-fit shirt in the same size will feel very different from a relaxed-fit shirt. Consider how you want the shirt to fit — close to the body, standard, or roomy — before choosing your size.
About the Shirt Size Calculator
How shirt size calculation works using body measurements
This calculator determines your shirt size by matching your body measurements against standard size charts compiled from major shirt manufacturers including Brooks Brothers, Charles Tyrwhitt, Hanes, and Gildan. It supports both men's sizing (dress shirts by neck/sleeve and casual shirts by chest) and women's sizing (by bust measurement). Results include alpha sizes, numeric sizes, and international equivalents across US, UK, and EU systems. The calculator also offers a height and weight estimation mode for quick approximate sizing.
Frequently Asked Questions
Common questions about shirt sizes, measurements, and fit