Men’s shirts and T-shirts size guide

Finding the perfect size for your shirts and T-shirts ensures comfort style and confidence in every look. This guide covers everything you need to know to select the right fit whether you're shopping for formal shirts, casual button-downs, polos, or basic tees.

Explore a wide range of men's tops, including T-shirts in crew neck, V-neck, and polo styles, as well as long-sleeve tees, casual shirts, formal dress shirts, and classic Oxford button-downs. This includes fits ranging from slim fit and oversized tees to slim, regular, and relaxed fit shirts.

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How to measure yourself for shirts and T-shirts

Accurate measurements are the foundation for a well-fitting shirt or T-shirt. Here’s how to measure yourself step-by-step:

Chest

Wrap the tape measure around the fullest part of your chest.  Keep the tape parallel to the ground and ensure its snug but not tight.

Shoulders

Measure straight across the back at the widest point, typically where your shoulders naturally slope. 

Neck (for dress shirts)

Wrap the tape measure around the base of your neck, just below the Adam’s apple. Allow space for comfort by placing one finger between your neck and the tape.

Sleeve length

Measure from the top of the shoulder where the seam would sit and run the tape down the outside of your arm to the wrist bone. 

Shirt length

Measure from the highest point of your shoulder (near the base of your neck), that it’s down to your desired shirt length. For casual shirts, this might end around the hip, while formal shirts may need to extend further for tucking in.

Short sleeve shirt measurement guide showing neck, chest, waist and hip width points with measurement lines.
T-shirt measurement guide showing neck, chest, waist and hip width points with measurement lines.

Conversion & measurement chart

This size chart is for reference only and may vary from product to product.

Men's Formal Shirts

Find your size with this reference guide. Please note, actual measurements may vary slightly by style.

UK/IRL/USneckinches1414 1/21515 1/216
EU / ITneckcm36371839-4041
UK/IRL/USneckinches16 1/21717 1/21818 1/2
EU / ITneckcm424344-454647

Men's Casual Tops

Find your size with this reference guide. Please note, actual measurements may vary slightly by style.

UK/IRL/EU/US/ITXSSMLXL2XL3XL
To fit chest, inchesupto 3636-3838-4041-4344-4647-4950-52
To fit chest, cmupto 9091-9697-102103-108109-118119-124127-132

Types of shirts covered

From classic dress shirts for formal occasions, to relaxed, casual shirts and versatile Oxford button-downs, we’ll help you navigate through various fits like slim, regular, and relaxed styles.

Types of T-shirts covered

Explore sizing for everyday essentials, including crew necks, V-necks, polos, and long-sleeve T-shirts. Discover fits ranging from slim fit tees for a sleek silhouette to relaxed and oversized styles for ultimate comfort.

Tips for accurate measurements

  • Take your measurements while wearing a thin shirt or a fitted undershirt. 

  • Avoid bulky clothing, as it can distort the results.

  • For sleeve length, slightly bend your arm while measuring to ensure ease of movement in the final fit.

  • Stand naturally with your arms at your sides and don’t puff your chest. 

 

Choosing the right fit based on body type

By selecting the right fit for your body type, you can enhance your style and feel confident in every outfit.

Slim build

  • Recommended fit: Slim or tailored fit shirts and T-shirts.

  • Why: These styles provide a snug fit that highlights your frame without looking baggy or oversized. 

Athletic build

  • Recommended fit: Muscle or slim fit shirts with stretch.

  • Why: These fits accommodate broader shoulders and a tapered waist, creating a clean silhouette. Look for stretch fabrics to enhance comfort and mobility.

Broad or stocky build

  • Recommended fit: Regular or relaxed fit.

  • Why: These styles offer room in the chest, shoulders, and midsection while avoiding a tight or restrictive feel. 

Tall build 

  • Recommended fit: Longline, oversized or tall-specific styles.

  • Why: These options provide extra length in the torso and sleeves, ensuring proper coverage and proportion.

Larger build:

  • Recommended fit: Relaxed or classic fit shirts with vertical patterns or darker shades.

  • Why: These fits offer comfort and a flattering appearance without excess bulk.

 

FAQs

What should I do if I’m between sizes?

If you’re between sizes, consider the fit and comfort you prefer:

  • Size up for a more relaxed fit or if the fabric is non-stretch.

  • Size down if you prefer a snug fit or the fabric has stretch.

What size is a medium men’s T-shirt?

  • A medium men’s T-shirt typically fits a chest measurement of 38–40 inches (96–101 cm). Always check our size chart, as styles can vary slightly.

How do I measure my neck size for a dress shirt? 

  • Wrap a tape measure around the base of your neck, just below your Adam’s apple. Make sure it’s snug but not tight and allow space for comfort by placing one finger between your neck and the tape.

What’s the difference between slim fit and classic fit shirts?

  • Slim fit is tapered at the chest and waist for a more contoured look, whilst a classic fit has less fabric and is roomier through the chest and waist, offering a more traditional silhouette.

What are UK shirt sizes?

  • UK shirt sizes are typically based on neck measurements in inches (e.g.15", 16"). Many retailers also indicate chest size in inches or include S, M, L, XL sizing equivalents.

Is 42” L or XL?

  • A chest measurement of 42 inches usually corresponds to a size large (L), but it can vary by brand. If you're unsure, check our size chart for confirmation.