T shirt sizes can be a confusing mess if you let it be. That is especially true considering that most regions have their standards.
Understanding these conventions can go a long way with our t-shirt manufacturers. The best part is that you don’t have to look further than this article to find out what you need.
We’ll go through UK and US t-shirt sizes, tell you how to measure the body, and some important conversions. With this information, you are bound to give customers what they want, earning you more sales.
Let’s get to it right now!

Table of Contents
Measuring Each Respective Part of Your Body

Neck size: Wrap the tape measure around your client’s Adam apple. Ensure there is consistency all around the neck from front to back to get the best results.
Bust/Chest size: The tape should be parallel to the floor. Place it around the fullest part of the chest/bust and get the measurements for a t-shirt. You can leave a small portion for a slightly tailored comfortable contemporary fit.
Hips: Place your tape measure around the full part of the hips. Your client should both fits together. Get the readings over the buttocks as well.
Inseam: Measure starting from the crotch of the legs’ inside seam. This should be done when the person is wearing their best-fitting pants. And the length should be measured to 1/2″.
Pro tip: When taking inseam measurements, make sure your clients wear shoes. This is especially useful in formal wear.
Understanding US Sizing

The Standard sizing of US clothing was developed in the 1940s and 50s. The concept was similar to EN 13402, Which is used in European clothes. It is mostly used for women’s wear.
However, fashion trends have changed over the years. So, fewer and fewer companies adhere to this standard strictly.
Modern clothing in America is influenced by obvious vanity sizing with slight variations. There’s little to no connection to the original standard-size chart.
But they contain specifically Americanized labels. Plus, the measurements are in the form of inches.
Recommended Reading: Understand Your Clothing Label Requirements USA
Understanding UK Sizing

The seizing used in the UK is rather unique. It has been adopted in most Commonwealth countries like New Zealand. It is worth noting that the UK differs significantly from European sizing systems.
The UK has its sizing standard for both clothes and footwear. The system used in the UK uses measurement based on height and other factors as opposed to age.
The standard used for women was developed in the early 1980s and is called BS 3666. It relies on bust, height, and waist measurements. Men’s clothing uses BS 6185, which also considers the same factors.
In the UK, they use centimeters instead of inches.
Things to Remember About UK and US T-Shirt Sizes
When converting sizes between us and UK sizes, the rules might change depending on gender and age.
That means women’s, men’s, and children’s t-shirt sizes are subject to different rules. When dealing with women, always offer them the option of larger t-shirt sizes.
In the UK men’s clothing sizes will be the same size with their US equivalent. Additionally, when it comes to kids clothing, you can ignore the size differences if they are younger than the age of 10.
After 10, genders will require different size adjustments. For example, girls require a larger chest measurement for the most accurate fit.
Pro insight: Always consult sizing charts and conversion tables if you want to change between US and UK sizes. If you deal with, choose in addition to T-shirts, convert smaller sizes for the UK.
Musharraf Niazi, Compliance Officer
How to Convert US to UK-size Clothes?

Correct size conversions between US and UK sizes may be tricky. You’ll find that numbers vary greatly depending on the product. That could also be because of the different units of measurement.
As a rule of thumb, always keep in mind that your case t-shirts are typically about a size larger than ours. So you will find that the same size as a woman’s US size 5 will most times be a UK size 9.
When it comes to shoe sizes, the US sizes will typically be smaller than their UK equivalent.
Men’s t-shirt sizes are a bit more straightforward. The US size will typically be identical to the UK ones. Like in women, the shoe sizes will be different.
The variations will be the same even when it comes to children’s shoe size conversions. The surest way of getting the right measurements is using the size conversion chart. Don’t worry, though; we’ll give you a men’s and women’s chart for UK vs US shirt sizes below.
At JaceApparel, we are experts in custom clothes manufacturing. That means we are adept at meeting a wide range of sizing options. Whatever size you want, we can make it for international orders. Think Europe, New Zealand, the UK, the US, and Australia.
Plus, our quality control leaves nothing to chance, ensuring consistency throughout. Offer your clients exactly the right size and improve your competitiveness.
US to UK Sizes Clothes Men Size Conversion Chart
UK Men’s Clothing Sizes | US Men’s Clothing | International sizes for Men |
30 | 30 | XS |
32 | 32 | XS |
34 | 34 | S |
36 | 36 | S |
38 | 38 | M |
40 | 40 | M |
42 | 42 | L |
44 | 44 | L |
46 | 46 | XL |
48 | 48 | XL |
50 | 50 | XXL |
52 | 52 | XXL |
UK to US Size Chart Women Size Conversion Chart
UK Clothes Size Women’s | US Women’s Size | International Women’s Size |
4 | 0 | XS |
6 | 2 | XS |
8 | 4 | XS |
10 | 6 | S |
12 | 8 | S |
14 | 10 | M |
16 | 12 | M |
18 | 14 | L |
20 | 16 | L |
22 | 18 | XL |
24 | 20 | XL |
26 | 22 | XXL |
28 | 24 | XXL |
Common T-shirt Sizing Pitfalls—And How to Avoid Them
The Subjectivity Issue:
A common issue that you will come across is the subjectivity of individual sizing. To avoid this issue, always ask clients for specific measurements of the various body sections.
We are talking chest, neck size, hips and inseam. Also, make sure to get the specific countries sizing system. Then, communicate these with your manufacturer.
Lack Of Clarity:
Sometimes, businesses have problems understanding the nuances between multiple sizes. To tackle this, consider eliminating most of the variety in the labeling.
Both your employees and customers find too much variety confusing. Offer S, M, L, and XL only where necessary. The rest can be on a per need basis.
At JaceApparel, you get superb quality materials. Our team of experts handpicked exquisite materials for your brand, and we work with you to get the right one.
Additionally, we gave you a wide color palette to create your masterpiece. That way, you can satisfy the market and earn more sales.
Please add one expert tip here
Expert tip: Consider adjusting your closing size upwards to make the customers feel great. You should do this, especially if you are exporting in the US and the UK. This is called vanity sizing.
People Also Ask About UK and US T-Shirt Sizes
1. Are there regulations for t-shirt sizing?
Each country or region has its own consumer protections. For example, the US has the Federal Trade Commission (FTC). And it requires proper labeling of clothes. The specific guidelines on size labeling may not be as strict as other ladling. However, it’s generally considered good practice to label T-shirts properly.
2. What factors should I consider when selecting t-shirt sizes for brands?
The key factor in building the right brand is understanding your target audience. From here, you can consider things like fit style, neckline, and length measurements of your t-shirts.
3. How can I order custom shirts?
Making an order on JaceApparel is easy. Make your way to the website and navigate to the contact section. There, you will see a number of options, including live chat email and phone numbers. Select whichever is convenient for you and give our team instructions and what you need. Should you need any guidance, they will be happy to hold your hand.
4. Is it legal to put quotes on T-shirts?
The shirt answered yes. It is legal to put quotes on your shirts If you are a brand. Just ensure that they are not copyrighted or trademarked. Anything in the public domain is fair game unless it falls under fair use.
What’s Next
Exporting clothes in the international markets can be tricky, especially with seizing. That is why you should go with a reputable manufacturer like JaceApparel.
Enjoy top-of-the-line design, material sourcing, and production. Upgrade your inventory with the best lineup and management.
Use their strategic warehouses and shipping partners. Your customers will get their goods pronto. Become the go-to clothes seller dominating the market. Reach out today!
Sources:
Quora – How do UK shirt sizes compare to US shirt sizes?
Medium – Decoding UK vs. US Shirt Sizes: Your Ultimate Guide to Finding the Perfect Fit
Spocket – UK to US Size Conversion