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what is my suit jacket size calculator

Written by Tanya Zhang

When it comes to looking sharp and sophisticated in a suit, the key is in the fit and finding the right suit sizes for your body. A well-fitted suit can make all the difference in how you present yourself.

In this guide, we'll explore the intricacies of suit fit, from understanding body measurements, chest size, waist measurement, and the advantages and disadvantages of going custom fit or off-the-rack when it comes to buying a suit. We also have a handy suit size calculator for you to measure jacket size below.

 men's navy blue suit

Understanding Suit Fit

When it comes to suits, the fit is everything. A perfectly fitted suit not only enhances your appearance but also ensures comfort and confidence. Understanding the different components of suit fit is essential for making informed choices when selecting or tailoring your suit. Here, we'll break down the key elements of suit fit:

Chest Measurement

The chest measurement is the first number in suit size and refers to the circumference of the chest or the widest part of the upper body. For example, in a "42R" suit size, "42" represents the chest measurement in inches. Using a simple measuring tape can help you find this measurement.

Suit Jacket Length

The length of your suit jacket plays a pivotal role in defining your overall silhouette. It's crucial to strike the right balance between a jacket that's too short or too long. Here's what to consider:

  • Proper Coverage: Ideally, the jacket should cover your buttocks, creating a harmonious line from shoulders to hips.

  • Arm Mobility: Ensure that the jacket allows your arms to move comfortably without any restrictions. This is especially important when you need to reach or gesture.

There are also typically three length options:

  • Short (S): Short-length jackets are designed for individuals with shorter torsos or those who prefer a more youthful and modern look. They are denoted as "S" in the size, such as "42S."

  • Regular (R): Regular-length jackets are the most common and suitable for individuals with average height. They are represented as "R" in the size, e.g., "42R."

  • Long (L): Long-length jackets are designed for taller individuals, providing additional length in the torso. They are indicated as "L" in the size, like "42L."

Shoulder Fit

proper suit jacket size infographicThe fit of the shoulders is one of the most critical aspects of a suit. Ill-fitting shoulders can throw off the entire look. Here's what to look for:

  • Seam Alignment: The shoulder seams should align with your natural shoulder line. They should neither hang off the edge nor bunch up.

  • No Wrinkles: There should be no visible wrinkles or divots in the shoulder area. Wrinkles indicate that the jacket is either too tight or too loose.

Use this comprehensive guide on how to measure your shoulder width for accurate tailoring results.

Jacket Sleeve Length

Proper sleeve length is essential for a polished appearance. Here's how to gauge it:

  • The Shirt Cuff Rule: Your shirt cuffs should extend about half an inch (1-1.5 cm) beyond the jacket sleeves when your arms are at your sides. This showcases a well-proportioned look.

  • No Excessive Bunching: Avoid excessive fabric bunching at the sleeves, which can make the suit appear oversized.

Make sure your dress shirt sleeve length comes out a little bit from under your suit jacket. Having proper shirt sleeve length and jacket sleeve length will only help put together a more polished look. Check out our guide on how to measure sleeve length for more information. Pair your suit jacket with one of these slim fit professional dress shirts from Nimble Made.

Suit Pants Length

Getting the length of your dress pants or suit pants right is crucial for a neat and elegant look. Consider the following when it comes to pant size:

  • Grazing the Shoe Tops: The trousers should graze the top of your shoes without dragging on the floor or creating excessive bunching at the ankles.

  • The Break: Decide whether you prefer a slight break (a small fold at the hem) or a no-break look (trousers sit straight) based on your personal style.

visual infographic on how dress pants or slacks should fitHere are guides on how to measure pant length accuratelyhow to measure inseam properly, and how to measure hips.

Waist Size and Measurement

A well-fitted suit jacket should create a defined waistline without excessive tightness. This creates a flattering V-shaped silhouette. Avoid overly boxy jackets or ones that cinch too tightly. Use this guide on how to get your waist measurement in just a few simple steps.


Jacket Closure

When fastening the jacket, it should close smoothly without pulling or gaping at the buttons. If it does, it might indicate that the jacket is too tight or too loose in the chest and waist areas. Here's how a suit jacket should fit.

By understanding these critical components of suit fit, you'll be better equipped to make informed decisions when shopping for a new suit or when having one tailored to perfection. Keep in mind that every body is unique, so slight alterations may be necessary to achieve the ideal fit for your physique. The goal is to find or create a suit that not only fits well but also makes you look and feel your best.


Custom vs. Off-the-Rack Suits

When it comes to investing in a suit, one of the primary decisions you'll face is whether to go for a custom-made suit or opt for an off-the-rack (ready-to-wear) option. Each has its own set of advantages and considerations like how long it takes to get a suit tailored. Let's explore the key differences between these two choices to help you make an informed decision:

custom suit on mannequin with measuring tape

Custom-Made Suits


  • Precision Fit: Custom-made suits are tailored specifically to your measurements, ensuring a perfect fit. Every detail is adjusted to your body's unique contours.

  • Unlimited Style Choices: You have the freedom to choose from an extensive range of fabrics, styles, and details, allowing you to create a suit that reflects your personal taste.

  • High-Quality Craftsmanship: Custom suits are typically crafted by skilled tailors who pay meticulous attention to detail, resulting in a suit that's well-fitted and impeccably constructed.


  • Higher Cost: Custom-made suits are more expensive than off-the-rack options due to the personalized craftsmanship involved.

  • Time-Consuming Process: Expect several fittings and a longer wait time to receive your custom suit, as it's made from scratch to your specifications.

  • Initial Measurements: Precision in measurements is crucial, and any inaccuracies can lead to an ill-fitting suit.


Off-the-Rack Suits

light gray suit with white shirt and tie


  • Immediate Availability: Off-the-rack suits are readily available in stores and online, making them convenient for last-minute purchases or urgent needs.

  • Budget-Friendly Options: There's a wide range of price points, allowing you to find a suit that fits your budget.

  • Variety of Styles: You can choose from a diverse selection of styles and brands, catering to different tastes and occasions.


  • Limited Fit Precision: Off-the-rack suits are mass-produced, so they may not offer the same level of fit precision as custom-made suits. Alterations are often needed to achieve the ideal fit.

  • Less Personalization: While you can find a variety of styles, you may not have the same level of personalization in terms of fabric and design details.

  • Quality Varies: Quality can vary significantly among off-the-rack suits, so it's important to choose a reputable brand and carefully inspect the suit before purchasing.

The choice between a custom-made suit and an off-the-rack suit ultimately depends on your specific needs and preferences. Consider factors like your budget, the urgency of your purchase, and the level of customization you desire. If you're looking for off-the-rack dress shirts that fit without the tailor, we highly recommend these slim fit dress shirts.

Whichever path you choose, the key is to prioritize fit and comfort. A well-fitted suit, whether custom-made or off-the-rack, is the foundation of a stylish and confident look. Pair it with a clean white button up dress shirt and one of their skinny ties for a business professional look.


Suit Jacket Size Calculator

Gone are the days of guesswork and endless trial fittings when it comes to finding the perfect suit. We understand that a well-fitted suit can elevate your style and boost your confidence. That's why we've developed the ultimate tool to simplify the process – our Suit Size Calculator.

Taking into account your build, height, and waist measurements, this tool provides you with an estimated suit size that's tailored to your unique physique. Say goodbye to ill-fitting suits and hello to a wardrobe that complements your body like never before. Make sure to always refer to a suit size chart before purchasing.

Suit Size Calculator

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Read our helpful guides on how to match a navy suit with brown shoes, a black suit with brown shoes, and also the best suit colors to have.



With this guide in your toolkit, you're well on your way to becoming a suit fit expert. Remember that the perfect suit isn't just about looking great; it's also about feeling confident and comfortable in your own skin. Whether you opt for custom-made, off-the-rack, or sustainable choices, the fit is what truly matters.


Frequently asked questions about suit size

How do I calculate my suit size?

To calculate your suit size, you can use our online suit size calculator, which takes into account your build, height, and waist measurements to provide an estimated size.

What is a 42R suit size?

A 42R suit size typically refers to a men's suit with a 42-inch chest measurement and a Regular (R) length jacket, suitable for average-height individuals.

What size jacket is a 5 11 man?

For a 5'11" man, the jacket size can vary, but it's often around 40R, which means a 40-inch chest measurement with a Regular-length jacket. Refer to suit size charts before purchasing.

What size is a 36 suit jacket?

A 36 suit jacket typically corresponds to a smaller size, suitable for individuals with a 36-inch chest measurement, and may come in various lengths like Short (S), Regular (R), or Long (L).

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