Size Guide
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Sizing at a glance
- Adult jerseys: S, M, L, XL, 2XL, 3XL, 4XL, 5XL. 2XL–3XL add $2, 4XL–5XL add $4.
- Kids jerseys: youth XS, S, M, L, XL.
- Pet jerseys: pet XS, S, M, L, XL, chosen by chest first, then neck.
- The best match is a shirt that already fits; email us for any product’s measurements and we will send them.
- Wrong size? Exchange within 60 days with a free return label.
1. Three line-ups, three ways to size
A Jerzoo order often has a kid, a grown-up and a four-legged teammate in it. Each of those wears a different size range, and each range is chosen in its own way. This guide walks through all three, then covers in-between sizes, fit preferences and what to do if a jersey does not fit when it arrives.
| Range | Sizes | Where you find it | Main measurement |
|---|---|---|---|
| Adult | S, M, L, XL, 2XL, 3XL, 4XL, 5XL | Family Jerseys, custom adult jerseys, adult cheer gear | Chest width and body length |
| Youth | XS, S, M, L, XL | Kids Jerseys, custom kids jerseys | Chest width and body length |
| Pet | XS, S, M, L, XL | Pet Jerseys, custom pet jerseys | Chest girth, then neck girth |
Youth and adult sizes share letters but not measurements: a youth L is much smaller than an adult L. Always check that you picked from the right range, especially when ordering a whole family in one cart.
2. The favourite-shirt method (people)
The most reliable way to choose a size for a person is to measure a shirt they already love wearing. It takes about two minutes and beats guessing from age or height every time.
- Pick a short-sleeve shirt or jersey that fits the way you want this one to fit.
- Lay it flat on a table, front facing up, and smooth out the wrinkles. Do not stretch it.
- Chest width: measure straight across, from one side seam to the other, about one inch below the armholes.
- Body length: measure from the highest point of the shoulder, next to the collar, straight down to the bottom hem.
- Compare these two numbers with the measurements for the jersey you like. Email us the product name and we will send its measurements, then pick the size that matches most closely.
Chest width is the number that decides most fits. If the chest matches one size and the length another, go with the chest, unless the wearer is very tall and length really matters to them.
3. Measuring the body directly
No shirt to hand? You can measure the person instead, with a soft tape measure.
- Chest: wrap the tape around the fullest part of the chest, under the arms, keeping it level and relaxed. Do not pull tight.
- Height: for kids, a height measurement helps with length, as children grow taller faster than they grow wider.
A body measurement is the size of the person, not the jersey. A jersey needs room to move, so the jersey’s chest will be wider than the body chest. When you compare with the jersey’s measurements, look for the size that leaves comfortable room.
4. Choosing adult sizes, S to 5XL
Our family jerseys run from S up to 5XL so that every adult in the photo can wear the same design, from a slim teenager to a tall, broad uncle. A few tips that come up again and again:
- Relaxed or neat? If the wearer likes a loose, sideline-ready fit, go one size up from their usual tee size. If they like a neater fit over a T-shirt, stay with their usual size.
- Layering: wearing a hoodie underneath on cold match days? Size up once.
- Larger sizes: 2XL and 3XL cost $2 more, and 4XL and 5XL cost $4 more, because they use more fabric. The price updates as soon as you tap the size.
- Grandparents and gifts: when you cannot measure, ask for their usual T-shirt size and pick that. A free exchange is there if it is off.
5. Choosing youth sizes, XS to XL
Kids come in every shape and grow at their own pace, so age is only the roughest guide. The favourite-shirt method above works best. Our advice for growing players:
- Between two sizes, pick the larger one. Kids grow fast, and a jersey with a little room lasts a full season longer.
- For very young children, compare length carefully: a jersey that is too long can get in the way when running.
- Older kids at the top of the youth range may fit an adult S. Ask us for both sets of measurements before choosing.
- Ordering for siblings? Measure each child separately, even twins.
6. Measuring your dog or cat
Pet sizing depends on shape, not breed or weight. Two pets of the same weight can need different sizes, so a quick measurement is worth it.
- Chest girth: wrap a soft tape around the widest part of the chest, just behind the front legs. This is the most important number.
- Neck girth: measure around the base of the neck, where a collar sits, not high up behind the ears.
- Back length (optional): measure from the base of the neck to the base of the tail, to see how much of the back the jersey will cover.
- Keep one finger between the tape and your pet for comfort. Write down the numbers straight away, before your helper wriggles free.
- Send us your numbers or compare them with the pet jersey measurements we send you, and choose by chest first. If the neck falls into a different size, choose the larger of the two.
Tips from pet owners: measure after a walk when your pet is calm, offer a treat to make it a game, and if your pet has a deep chest and slim waist (like many sighthounds), pay most attention to the chest. If your pet is between sizes or has a fluffy coat, size up.
Always supervise your pet while they wear a jersey, and take it off if they seem uncomfortable, chew it or get too warm.
7. Between two sizes?
| Situation | Our suggestion |
|---|---|
| A growing child | Choose the larger size. |
| An adult who likes a loose fit | Choose the larger size. |
| An adult who likes a neat fit | Choose the smaller size if the chest still has room. |
| Wearing layers underneath | Choose the larger size. |
| A pet with a thick coat or deep chest | Choose the larger size. |
| A pet whose neck and chest fall in different sizes | Choose by the larger of the two. |
8. Personalisation and size
The name and number you type are placed to suit the size you pick. On smaller sizes, such as youth XS or pet XS, long names take up more of the back. The name field allows up to 12 letters, but on the smallest sizes a shorter name or nickname often looks bolder. Use the live preview on the product page to get a feel for the balance. We print exactly what you type, and there is no proof before production, so check spelling before you check out.
9. Cheer gear sizes
Adult tees and the hoodie in Cheer Gear follow the same adult range, S to 5XL. The pet bandana has its own sizes listed on its product page, based on neck girth. The tumbler and tote are one size.
10. If the size is not right
It happens, especially with kids and pets. You can exchange any item for a different size within 60 days of delivery, personalised jerseys included, and change-of-mind returns get a free return label. Email us with your order number and the size you need. Full steps on Returns & Exchanges; refund timing on the Refund Policy.
Ordered and realised straight away that you picked the wrong size? Email us within 24 hours of ordering and we can change it before production. See Cancel or Change an Order.
11. Three worked examples
The Rivera family photo
Dad usually wears an XL tee and likes room to move, so he takes 2XL (+$2). Mum measures her favourite shirt flat and matches an M. Their daughter is between youth M and L, so they choose youth L for growing room. Their beagle’s chest measurement points to pet M, and his neck to pet S, so they choose pet M by the larger of the two. Four sizes, three ranges, one cart.
Grandpa’s surprise
Nobody can measure Grandpa without spoiling the surprise. His daughter knows he buys 4XL tees for a relaxed fit, so she orders a 4XL family jersey (+$4) with “POPS” on the back. If it is off, Grandpa can exchange it within 60 days with a free label.
The fluffy cat
A long-haired cat measures right at the top of pet S. Because the coat adds bulk and cats dislike anything tight, the owner picks pet M and checks the neck sits loosely with one finger of room.
12. Fit by product type
- Family and custom adult jerseys: a sporty, easy fit made for moving, not a compression fit.
- Kids jerseys: cut for running around; leave room for growth.
- Pet jerseys: an open shape for the legs and tail; never choose a size that pulls tight around the chest.
- Tees and hoodie: everyday casual fit in the adult range.
Fabric, cut and care details for each item are on its product page. If you would like a measurement we have not listed, ask us.
13. Common sizing mistakes
- Choosing a youth size when an adult size was needed, or the other way round. Check the range before you add to the cart.
- Measuring a stretched-out shirt. Use one that still keeps its shape.
- Measuring a pet’s neck too high, behind the ears. Measure where the collar sits.
- Guessing from age. Children of the same age can be two sizes apart.
- Forgetting layers. If a hoodie goes underneath, size up.
14. Measuring with no tape measure
No soft tape in the house? Use a piece of string, a phone charging cable or a ribbon. Wrap it where the tape would go, pinch the point where it meets, then lay it flat next to a ruler or a rigid tape from the toolbox. For flat-lay shirt measurements, a ruler or a straight edge and a little patience is all you need. Write every number down straight away with a note of who it belongs to, especially when sizing a whole family on the same evening.
15. Sizing questions we hear often
Is a youth XL the same as an adult S?
Not always. They can be close, but they are different cuts. Ask us for both sets of measurements and compare with a shirt that fits.
Do the sizes match across designs?
Products of the same type and range are sized the same way. Different product types, such as a jersey and a hoodie, fit differently, so check each one.
Can I order two sizes and return one?
Yes. Returns are free within 60 days, so ordering two sizes of a plain jersey to compare is fine. For personalised jerseys, think twice: each one carries your lettering.
Will a jersey shrink after washing?
Follow the care details on the product page. In general, cool washes and air drying help any printed garment keep its shape and lettering.
16. Sizing help from a person
Still unsure? Email support@jerzoo.shop with the product name, who it is for, and your measurements (shirt flat-lay or pet chest and neck). We reply within 24 hours on business days with our suggestion. More answers live in the FAQs and Help Center.