How to Choose the Right Size for a Custom T-Shirt

You have found the perfect design for your custom t-shirt. The visual is ready, the text too… but when it comes to placing the order, doubt sets in: M, L or XL? And if you are ordering for others, how can you be sure you get the right size?

This is one of the most frequent questions we receive at UNiKtee. And that is perfectly normal: t-shirts are not all cut the same way, brands vary, and when you personalise a garment with a logo or a message, you do not always have the option of trying it on before confirming your order.

In this article, we give you all the keys to choosing the right size, avoiding unpleasant surprises, and receiving t-shirts that really delight — yourself or those you are giving them to.

Why T-Shirt Sizes Vary So Much from Brand to Brand

The first thing to know is that there is no universal standard for clothing sizes. An M with one brand can easily correspond to an L with another. This is even more pronounced when comparing unisex t-shirts — which often have a straight, relaxed cut — with women's fit models, which are generally more fitted and shorter.

At UNiKtee, we work with several quality t-shirt references. Each product page provides a precise size guide, with measurements in centimetres. Our top tip: always consult the size guide for the chosen reference, rather than relying solely on the letter (S, M, L, XL…).

The two most important measurements to know are:

• Chest width: measured flat, from seam to seam, just below the arms. Multiply by 2 to get the total chest circumference.
• Garment length: measured from the shoulder seam to the bottom hem of the t-shirt.

The most reliable method? Take a t-shirt you already love at home, lay it flat, measure it, then compare these figures with our size guide. In seconds, you have your answer — without having to guess.

Ordering Sizes for a Group: Our Practical Tips

Are you ordering personalised t-shirts for a group — a sports association, a corporate seminar, a hen or stag do, a school trip? The challenge is even greater: you need to collect everyone's sizes without it turning into a headache.

Here are some tips that really work:

• Send the size guide link to each person concerned. Everyone can then check their size based on their own measurements, without depending on their habit of wearing M or L.
• Allow one size up if in doubt. A slightly large t-shirt always works better than one that is too tight. And quality fabric retains its shape well even with some ease.
• For children, specify the age AND height in centimetres: two children the same age can have very different builds.
• Create a simple Google Form with the available sizes and the link to our guide. You collect all responses in the same place, without endless message exchanges.

The good news at UNiKtee: there is no minimum order. You can perfectly well order 1 t-shirt in size S and 3 in XL if that is what you need. No obligation to order equal quantities per size.

What UNiKtee Does to Make Ordering Easy for You

We know that ordering personalised garments without being able to try them on is an act of trust. That is why we do everything possible to ensure you have all the information you need before confirming your basket.

On each product page in our shop, you will find:

• A detailed size guide with measurements in centimetres (width and length)
• Information on the cut: straight, slim, oversized, women's fit…
• The fabric composition, which influences the drape, flexibility and final print result

And if the slightest doubt remains, our team is available to advise you. Based in Elven, just minutes from Vannes in Brittany, we respond quickly to your questions — by message, email or phone. No automated response, no bot: real people who truly know their products.

Whether you are ordering t-shirts for a hen or stag do, workwear for your team or personalised gifts for an event, we take the time to help you choose the right reference and the right sizes. Our rating of 4.9/5 and our 72h delivery time reflect this commitment.

In Summary: The Golden Rules for Choosing the Right Size

To never get a t-shirt size wrong again, remember these key points:

• Measure an existing t-shirt that you wear and love, then compare with the size guide for the desired model.
• Trust centimetres, not letters: S, M, L do not mean the same thing everywhere.
• If in doubt, go one size up — especially for models you have never worn before.
• For a group, send the size guide to everyone and collect responses via an online form.
• Contact us if you have any questions: that is what we are here for.

Choosing the right size for a personalised t-shirt with fast delivery is ultimately just a matter of measurements — not habit. Two minutes of preparation, and you are sorted.

Ready to place your order? Visit uniktee.com — from just 1 item, no minimum, 72h delivery throughout France.