How to Choose a T-Shirt Size and Fit When You Buy Online
Measure a tee you already own, read the size chart correctly, and avoid the most common mistake: mixing garment and body measurements.
In short: To choose a t-shirt size online, measure a tee you already own and like, laid flat. Compare its chest width and body length with the size chart, after checking whether the chart lists the shirt or the body, since the two differ. If the listing gives no measurements, ask the seller before you order.
A size label is a name, not a measurement. Two shops can both sell a medium, and one can cut it noticeably wider or longer than the other. Buying online removes the fitting room, so the numbers have to do the work.
This post shows how to choose a t-shirt size online. It covers why sizes differ, which measurements matter, how to read a chart and how to break a tie between two sizes. The advice applies to any online shop, and it states no HollaJack garment measurements.
Why does the same size fit differently from shop to shop?
There is no single standard behind the letters on a tee. Four things move the result.
- Cut. A boxy, relaxed or fitted cut changes how a size sits on the same body.
- Intended wearer. A women’s cut and a men’s or unisex cut are shaped differently, even at the same letter.
- Fabric behavior. Some fabrics relax, stretch or shrink a little after washing.
- Chart style. One shop lists the shirt’s own dimensions. Another lists the body it is meant for.
Because of this, comparing a number with a number is more reliable than trusting a letter.
How do you measure a t-shirt you already own?
Start with a shirt whose fit you like, preferably one you have washed the way you normally wash. Then:
- Lay it flat on a table with the front facing up. Smooth the wrinkles without stretching the fabric.
- Chest. Measure straight across, from one underarm seam to the other.
- Body length. Measure from the highest point of the shoulder, beside the collar, straight down to the bottom hem.
- Shoulder. Measure across the back from one shoulder seam to the other.
- Sleeve. Measure from the shoulder seam to the end of the sleeve. Charts differ on where sleeve length starts, so read any note beside it.
Write the numbers in the unit the chart uses, inches or centimeters. A flat chest measurement is half the distance around. Say your reference tee is 20 inches across when laid flat. Doubled, that is 40 inches around, which is the number to compare if the chart lists the full circumference.
How do you choose a t-shirt size online from a size chart?
Look for the size whose numbers sit closest to your reference shirt. The table shows what to compare, and what to do between two sizes.
| Measurement | How to take it on your reference tee | What to compare on the chart | If you land between sizes |
|---|---|---|---|
| Chest | Flat, underarm seam to underarm seam | The chest or width figure (double yours if the chart gives the full circumference) | Go smaller for a closer fit, larger for a roomier one |
| Body length | High shoulder point beside the collar to the hem | The length figure | Go longer if you tuck or are tall, shorter if you want it to sit higher |
| Shoulder | Seam to seam across the back | The shoulder figure, if listed | A seam that sits past your shoulder gives a deliberately oversized look |
| Sleeve | Shoulder seam to sleeve hem | The sleeve figure and where the chart starts measuring | Decide by how you like the sleeve to fall on your arm |
| Chart type | Read the chart’s title and notes | Whether it says garment measurements or body measurements | If it does not say, ask the seller before you order |
A worked example, with illustrative chart figures: your reference tee measures 20 inches across the chest and 28 inches long. The chart lists a medium at 19.5 by 28 and a large at 21 by 29. The medium is half an inch narrower and the same length, so it is the closer match if you like your tee as it is. The large adds an inch each way, which suits you only if you want more room.
What is the difference between garment and body measurements?
Garment measurements describe the shirt itself, laid flat. You can compare them directly with your reference tee. Body measurements describe the person a size is designed for, and the shirt is cut with some extra room around that number.
If the chart lists body measurements, measure yourself instead. Wrap a soft tape level around the fullest part of your chest, relaxed and not pulled tight, or ask someone to help. Find the range that contains your number, and if you sit between two ranges, let your preferred fit break the tie.
The most common sizing mistake is mixing the two. Say your chest measures 38 inches around your body, and a garment chart lists a large at 38 inches around. That large has no room left over, so it would sit tight on you. Compare shirt with shirt and body with body, and the problem disappears.
How do shrinkage and fit preference change the choice?
Fabric can behave differently after the first few washes. Check whether the listing mentions pre-shrunk fabric or care guidance, and wash cold with low dryer heat or an air dry to limit the change. If the listing is silent, a small shrink is a reason to avoid the tighter of two sizes.
Then consider how you wear the shirt.
- Worn alone: compare directly with your reference tee.
- Worn under a jacket or shirt: a slightly closer fit often sits better.
- Worn tucked in: pay attention to length, not just chest.
- Worn oversized on purpose: choose the larger size, and expect the shoulder seam to fall lower.
What if it still does not fit?
Ask the seller when a listing leaves out what you need. HollaJack offers a Men’s and Unisex tee and a Women’s tee, so decide which cut you are comparing against. If a HollaJack product page does not answer your sizing question, write to [email protected] before you order.
Returns follow a short set of rules. You have 14 days from delivery, and the piece must be unused and still in its original packaging. You pay the return shipping, and the refund reaches your original payment method within 14 days of the return arriving. Email [email protected] before you send anything back, and read the full terms on the policies page.
Because the piece must come back unused, the measuring has to happen before the shirt arrives, not by wearing it. There is a collector’s point too. A returned piece’s edition number is not reissued, and a reorder takes the next number in the run, so the new size will carry a different number.
If you are buying for someone else, measure a shirt they already wear, which is a quiet way to get the numbers. The gift guide for people who have everything covers choosing the piece itself. The FAQ answers questions about how editions work, and the shop lists the current designs.
Frequently asked questions
How do I choose the right t-shirt size online?
Measure a tee that already fits you well, laid flat, and pick the size whose chart numbers sit closest to it. Check first that the chart lists garment measurements, not body measurements.
Should I size up or down in a graphic tee?
Let the way you wear it decide. Size up for a relaxed look or when shrinkage is not mentioned. Otherwise, stay with the size closest to a shirt you already like.
Is a unisex tee the same as a men’s tee?
Not always, because shops use the names differently. Rely on the measurements in the listing and on the cut it describes, and ask the seller if the chart does not say.
Can I return a t-shirt that does not fit?
On HollaJack, yes, if it is unused, in its original packaging and within 14 days of delivery. Email [email protected] first, and expect to pay the return shipping yourself.
