Suit Size Calculator - Mens Suit Size Calculator & Jacket Size Guide
Free suit size calculator & mens suit size calculator. Find your perfect jacket size, pant size, and dress shirt size based on body measurements. Our calculator uses professional tailoring standards to provide accurate suit sizes for slim fit, classic fit, and relaxed fit preferences with brand-specific size comparisons and alteration recommendations.
Last updated: December 15, 2024
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Body Measurements
Measure around fullest part of chest
Measure at belly button level
From shoulder to wrist with arm bent
Your Suit Sizes
Fit Style
Classic Fit - Traditional, comfortable cut
Jacket Size
40R
Pant Size
34 × 32
Shirt Size
16/34
Measurements
40"
Brand Size Guide:
Recommendations:
- • Regular build - standard fits should work well
- • Always try on suits before purchasing if possible
- • Professional alterations can perfect the fit
Potential Alterations:
- • Off-the-rack fit should be good
Perfect Fit Tips:
- • Jacket shoulder seams should align with your natural shoulder edge
- • Jacket length should cover your seat and hit mid-thumb when arms are relaxed
- • Sleeve should show 1/4 to 1/2 inch of shirt cuff
- • Pants should have slight break at the shoe
Suit Size Calculator Components & Measurements
Size format
40R, 42L, etc.
Number = chest, Letter = length (S/R/L/XL)
Size format
34 × 32
Waist × Inseam in inches
Size format
16/34
Neck / Sleeve in inches
Sizing adjustment
-2 inches
Closer fit, tapered through body and legs
Sizing adjustment
True to size
Standard room through chest, waist, and legs
Drop size
7-8 inch drop
More room in chest/shoulders, tapered waist
Quick Example Result
For 40" chest, 34" waist, 5'10" height (classic fit):
Jacket
40R
Pants
34 × 32
Shirt
16/34
How the Suit Size Calculator Works
Our suit size calculator uses professional tailoring standards to convert your body measurements into standard suit sizes. The calculator accounts for different fit preferences (slim, classic, relaxed) and provides size recommendations across major suit brands with specific fit characteristics.
Suit Sizing Formula
Jacket Size Calculation:
1. Measure chest circumference (fullest part)2. Round to nearest even number3. Determine length: S (<5'8"), R (5'8"-6'), L (6'-6'3"), XL (>6'3")4. Format: [Chest Size][Length] (e.g., 40R)Pant Size Calculation:
Waist (inches) × Inseam (inches)Dress Shirt Calculation:
Neck (inches) / Sleeve (inches)The calculator adjusts for fit preference: slim fit subtracts 2 inches, classic fit uses standard measurement, and relaxed fit adds 2 inches. This ensures the recommended size matches your style preference.
Understanding Suit Fit Standards
Proper suit fit combines correct sizing with appropriate style. The jacket should skim your body without pulling or excess fabric. Shoulders are the most critical element - they should align with your natural shoulder line. Pants should sit at your natural waist with appropriate break at the shoe. A well-fitted suit enhances your silhouette and ensures comfort throughout the day.
- Jacket shoulders cannot be altered significantly - size must be right
- Chest should allow fist to fit when buttoned (comfort test)
- Sleeve length shows 1/4 to 1/2 inch of shirt cuff
- Jacket length should cover your seat completely
- Pant break varies by style: no break (modern), slight (versatile), full (traditional)
- Professional alterations perfect fit for $50-200 typically
Sources & References
- Brooks Brothers - Professional Suit Sizing Guide200+ years of tailoring expertise and sizing standards
- Men's Wearhouse - Suit Fit and Measurement GuidelinesIndustry standard measurements and fit recommendations
- GQ Magazine - Complete Guide to Suit FitExpert menswear advice and style guidelines
Looking to improve your overall appearance? Check out our body recomposition calculator and productivity calculator.
Get Custom Calculator for Your PlatformSuit Size Calculator Examples
Body Measurements:
- Height: 5'10" (70 inches)
- Chest: 40 inches
- Waist: 34 inches
- Sleeve: 34 inches
- Neck: 16 inches
- Inseam: 32 inches
Size Calculations:
- Chest 40" → Jacket size 40
- Height 5'10" → Regular length (R)
- Combined: 40R jacket size
- Pants: 34 waist × 32 inseam
- Shirt: 16 neck / 34 sleeve
Result: Jacket 40R, Pants 34×32, Shirt 16/34
Standard 6-inch drop (40 jacket, 34 waist) - most brands will fit well
Athletic Build Example
44" chest, 34" waist (10" drop)
Needs athletic fit or separates
Tall Build Example
6'2" height, 38" chest
Size 38L (Long length needed)
Frequently Asked Questions
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