Fashion Tool

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

Professional tailoring measurements and standards
Multiple fit styles (slim, classic, relaxed)
Brand size comparisons and fit recommendations

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Suit Size Calculator
Find your perfect suit size based on measurements

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:

Brooks Brothers:Jacket 40R / Pants 34 × 32
Hugo Boss:Jacket 40R / Pants 34 × 32
J.Crew:Jacket 40R / Pants 34 × 32

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

Jacket Size Calculator
Based on chest and height measurements

Size format

40R, 42L, etc.

Number = chest, Letter = length (S/R/L/XL)

Pant Size Calculator
Waist and inseam measurements

Size format

34 × 32

Waist × Inseam in inches

Dress Shirt Size Calculator
Neck and sleeve length combination

Size format

16/34

Neck / Sleeve in inches

Slim Fit Suits
Modern, tailored silhouette

Sizing adjustment

-2 inches

Closer fit, tapered through body and legs

Classic Fit Suits
Traditional, comfortable cut

Sizing adjustment

True to size

Standard room through chest, waist, and legs

Athletic Fit Suits
Designed for muscular builds

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.

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Suit Size Calculator Examples

Suit Size Calculation Example
Calculate suit size for 5'10" man with 40" chest and 34" waist

Body Measurements:

  • Height: 5'10" (70 inches)
  • Chest: 40 inches
  • Waist: 34 inches
  • Sleeve: 34 inches
  • Neck: 16 inches
  • Inseam: 32 inches

Size Calculations:

  1. Chest 40" → Jacket size 40
  2. Height 5'10" → Regular length (R)
  3. Combined: 40R jacket size
  4. Pants: 34 waist × 32 inseam
  5. 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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