Chest Size Calculator
Chest circumference drives shirt alpha, jacket numeric, and suit length. Adjustments for build, shoulders, fabric stretch, layering, and fit preference.
Measure around the fullest part of the chest, under the arms, with the tape horizontal.
Primary recommendation
Shirt M · Jacket / suit 42R
Best numeric range: 40 – 42
Chest (in)
40.0
Adjusted chest (ease)
40.5
Alpha (shirt)
M
Jacket numeric
42
Upper body fit: Perfect (clean drape)
Balanced proportions — tailored or regular fit usually works well.
- Minor sleeve or length tweaks are common for an ideal finish.
Garment-specific outputs
Shirt: Alpha M — prefer regular block in woven shirts.
Jacket / blazer: 42R
Suit: 42R — trousers typically ordered to waist/inseam separately.
Chest to alpha reference
34 – 36 inS
38 – 40 inM
42 – 44 inL
46 – 48 inXL
50+ inXXL