T-Shirt Size Guide: How to Measure Yourself and Order the Right Size Online
Size is the most common reason an online clothing order disappoints. Brand charts differ, bodies differ, and what looks like "medium" on one site can be "large" on another. The fix is easy and takes five minutes: measure a shirt you already own and compare numbers rather than letters.
Pick a T-shirt that fits the way you like
Choose the T-shirt in your wardrobe that fits exactly as you want the new one to fit: close and neat, or loose and relaxed. This one shirt is your reference for everything that follows. Wash it first if it is new, so it has shrunk to its final size.
Lay it flat and measure the chest
Place the shirt on a table, smooth out the wrinkles and measure straight across the chest, from one side seam to the other, about two to three centimetres below the armpit. Write the number down. Double it if you want the full circumference, which is useful when a size chart lists chest in that form.
Measure the length
Measure from the highest point of the shoulder, next to the collar, straight down to the bottom hem. Length matters more than people expect: a shirt that is too long looks sloppy, and one that is too short rides up when you move.
Compare with the product
Ask for the measurements of the product you want, or compare the description and photos with your reference shirt. If the new one is a few centimetres wider across the chest, expect a looser fit. If it is narrower, expect it to sit close to the body.
| Your goal | What to choose |
|---|---|
| Regular, neat fit | Your usual size |
| Relaxed or oversized look | One size up |
| Between two sizes, want comfort | The larger size |
| Between two sizes, want a close fit | The smaller size |
Decide how you will wear it
Think about layering. A shirt worn under a jacket or hoodie can be closer to the body. A shirt worn on its own in summer often looks best slightly looser. If the design has a large print, a little extra room also keeps the graphic from stretching across the chest.
Common sizing mistakes
Most sizing problems come from a small number of habits.
- Trusting the letter and not the number. An M from one brand may match an L from another. Compare measurements instead.
- Measuring over thick clothing. If you measure your own body, wear a thin layer or nothing, and keep the tape level and snug but not tight.
- Ignoring the shoulders. A shirt can fit across the chest and still pull at the shoulders. Seams should sit close to the edge of your shoulder, or slightly beyond it for a relaxed fit.
- Forgetting shrinkage. Cotton can shrink a little after washing. If you prefer a roomy fit, size up slightly or wash cold and air dry.
- Not considering layers. A shirt that fits alone may feel tight under a hoodie.
Fabric and fit over time
Cotton T-shirts relax with wear. They may feel snug on the first day and soften after a few washes. Heavier fabrics keep their shape longer, while lightweight ones drape more. If you plan to wear the shirt often, choose the size that is comfortable now rather than one you hope to shrink into.
Washing also matters. Hot water and a hot dryer shrink cotton the most. Cold water, a gentle cycle and air drying keep the size and the print stable.
Choosing a size for different builds
Bodies differ and so do preferences, so treat these as starting points.
| Build | A good starting point |
|---|---|
| Slim, tall | Your usual size; relaxed look: one size up for width, but check the length |
| Athletic, broad shoulders | Check the shoulder and chest measurements; size up if the chest is tight |
| Average | Your usual size for regular fit, one size up for oversized |
| Broader midsection | Choose by chest and waist measurements and prefer the larger size |
Reading size charts from different countries
Size charts differ between regions. European, American and Asian sizing can vary by one full size. When a chart lists measurements in centimetres or inches, use those numbers and compare them with the reference shirt. If the product lists sizes only in letters, ask for the measurements before buying.
What to do when the shirt arrives
When your order arrives, try the shirt on in front of a mirror and move around in it. Raise your arms, sit down and bend forward. The shirt should feel comfortable in all these positions, and the sleeves should sit naturally on the upper arm. If you are unsure, compare the shirt with your reference shirt on a flat surface. Differences of one or two centimetres are normal in handmade items, but a bigger difference is worth mentioning, so tell us and we will help.
Why a good fit changes everything
A well-chosen size changes how you look and feel more than almost any other detail. A shirt that fits properly hangs cleanly from the shoulders, keeps the print flat and does not need constant adjusting. It also lasts longer, because fabric under tension wears faster. Spending five minutes on measurements is the cheapest upgrade your wardrobe can get.
A quick checklist before you press send
- Reference shirt measured: chest width and length.
- Fit decided: regular or relaxed.
- Height and usual size ready to share.
- Country and delivery address in mind.
Ask before you order
If you are still unsure, send your height, your usual size and the reference measurements in a message. Red+Baron T-shirts come in sizes from S to 3XL, and we are happy to recommend a size on WhatsApp before you commit.
Ready to choose? Open the collection, pick a design and message us with your size.
FAQ
What sizes do Red+Baron T-shirts come in?
Red+Baron T-shirts are offered in sizes S, M, L and XL up to 3XL.
Should I size up for a relaxed fit?
Yes. For a looser, oversized look go one size up from your usual size.
What if I am between two sizes?
Choose the larger size if you prefer comfort, and the smaller one if you want a closer fit.