A tee can look perfectly oversized on the product page, then feel either too snug through the shoulders or way bigger than planned when it arrives. That is why knowing how to choose unisex sizing matters. The right size is not just about the number on the tag - it is about the fit you want, the garment measurements and how you like to wear your everyday staples.
Unisex clothing is designed to be worn by everyone, but it does not mean every unisex garment fits exactly the same way. A unisex oversized T-shirt has a different job to do than a standard-fit tee. It should feel easy, relaxed and wearable, without looking like you grabbed the wrong size by accident.
What unisex sizing actually means
Unisex sizing uses one size range rather than separate men's and women's cuts. It is usually based on a straighter body shape, with room through the chest and body. Depending on the brand, it may sit closer to traditional men's sizing, or it may be cut specifically for a relaxed, gender-inclusive fit.
That is why your usual size is a useful starting point, not a guaranteed answer. A medium from one label can fit very differently from a medium elsewhere. Fabric weight, shoulder width, body length and whether the piece is already oversized all change the final look.
For casual streetwear, this is good news. You get more freedom to choose your fit based on your style, not a label category. Want a clean, slightly relaxed tee? Start closer to your regular size. Chasing that roomy, off-duty oversized look? You may prefer your regular size in an intentionally oversized cut, or one size up in a more standard cut.
How to choose unisex sizing without guessing
The best move is to compare the size chart with an item you already own and love wearing. Ignore the size label for a minute. A tee marked large might fit smaller than another tee marked medium, so the actual measurements tell the real story.
Lay your favourite T-shirt flat on a table or bed and smooth it out. Measure across the chest from armpit to armpit, then measure from the highest point of the shoulder down to the hem. If the product size chart includes sleeve length or shoulder width, measure those too.
Match those numbers against the garment chart, not just your body measurements. If a chart shows half-chest measurements, it means the shirt has been measured flat across the front. You do not need to double it unless you are comparing it with your full chest circumference.
A simple rule works well: choose the size closest to the measurements of a tee you already wear on repeat. It takes the guesswork out of online shopping and gives you a much more reliable idea of how the garment will sit on your frame.
Start with the fit you want
Before picking a size, decide how you want the item to look. Unisex clothes can be styled in plenty of ways, and the same T-shirt can look completely different depending on the size you choose.
If you prefer a neater everyday fit, go with the size closest to your usual measurements. You will still get the comfort of a unisex piece, but with less extra fabric through the body and sleeves.
If your goal is relaxed streetwear, choose the size that gives you some room in the chest and a dropped-shoulder feel. For an oversized tee that is already designed with extra volume, your usual size often delivers that look. Sizing up again can work, but expect more length, wider sleeves and a much looser body.
If you are between sizes, think about what matters most. Size down if you want less length and a tidier shape. Size up if you want extra room through the shoulders, prefer layering, or simply love a baggier fit. There is no wrong choice - it depends on the look you will actually wear.
Check length as well as width
Chest measurements get most of the attention, but length can make or break an oversized fit. A tee may be wide enough through the body but too long for your preferred styling, particularly if you are shorter or like to wear it with shorts, skirts or fitted bottoms.
Look at where your current favourite tee finishes. Is it at the waistband, below the hips or closer to mid-thigh? Compare that length to the chart before you order. A longer tee can look intentional with relaxed denim or cargos, while a slightly shorter oversized fit can feel sharper with tailored pants or bike shorts.
Also check the sleeves. Longer, wider sleeves add to the oversized silhouette, but they are not for everyone. If you like your sleeves sitting closer to the upper arm, staying with your regular size may be the better call.
Do not rely on standard AU size conversions alone
AU sizing can be helpful when you are comparing women’s or men’s size ranges, but unisex garments are not always built around a direct conversion. A brand may describe a small as suitable for multiple body types, while another may use small as a much more fitted option.
Treat broad conversions as a guide only. Measurements are more useful than trying to translate an AU 10, 12 or 14 into a unisex letter size. This is especially true with oversized styles, where the cut is deliberately different from a classic fitted tee.
Your height and proportions matter too. Two people can wear the same chest size but want totally different results because one is taller, has broader shoulders or prefers more coverage. Product images can help you picture the vibe, but use the measurements to make the final call.
Think about fabric and shrinkage
The fabric affects how a unisex garment feels after a full day of wear. Cotton tees may soften and relax slightly with use. Heavier cotton often holds its shape better and gives an oversized fit more structure, while lighter jersey can drape closer to the body.
Always follow the care label. Washing in cold water and avoiding high heat is usually the safest way to protect colour, shape and print. If you know you prefer a roomier fit after washing, factor that into your decision rather than relying on a dryer to create extra space.
A quality oversized tee should look relaxed because of its cut, not because it has stretched out. The shoulders should still sit comfortably, the neckline should hold its shape and the hem should fall cleanly.
Styling your chosen size
Once you have picked your fit, make it yours. A regular-size unisex tee can be worn with straight-leg jeans, shorts or trackies for an easy everyday uniform. An oversized fit works brilliantly with cargos, baggy denim or fitted bottoms that balance the volume up top.
For a cleaner look, half-tuck the front or cuff the sleeves once. For a full streetwear silhouette, let the tee hang naturally and pair it with relaxed pants and sneakers. Accessories can shift the whole feel too - a cap, crossbody bag or simple jewellery can make a basic tee look properly considered.
At SBH, the point of a unisex oversized tee is simple: comfort that still looks like a choice. You should be able to throw it on for a coffee run, a gig, a lazy Sunday or whatever is on the agenda, and feel good in it.
A quick check before you add to cart
Before ordering, take one last look at the product size chart and compare it with your favourite tee. Check the chest width, body length and any fit notes, such as oversized, relaxed or standard. Then ask yourself whether you want the fit shown on the model or something more fitted or more roomy.
If you are still deciding between two sizes, choose based on the garment you will reach for most. The best unisex size is not the one that sounds right on paper. It is the one that gives you the comfort, shape and confidence to wear it on repeat. 🙌