Baby tees are the most-used item in an infant wardrobe. Short sleeve t-shirts in sizes NB to 18M that parents reach for daily, worn under overalls, on their own in warm weather, or layered under a fleece bodysuit in cooler months. These baby tees are cut from 100% combed ringspun cotton chosen for how it holds up through the daily wash cycle every infant wardrobe demands. Gender neutral colours and printed designs are available across the full NB to 18M size range.
Baby Tee Styles and Sizes: NB to 18M
Baby tees come in two main styles: plain solid colours and printed graphic designs. Both styles use the same 100% combed ringspun cotton construction and run in the same sizes: newborn (up to 8 lbs), 0-3M, 3-6M, 6-12M, and 12-18M. For sizes NB and 0-3M, an envelope neckline is the right choice. The wider opening expands sideways so the tee passes over the head without stretching or pulling. Short sleeve is the standard cut for year-round use as a base layer or a standalone top.
Sizing Baby Tees: From Newborn Through 18 Months
Newborns under 8 lbs fit the NB size. For babies over 8 lbs at birth, start at 0-3M, which fits from birth and lasts longer before the next size is needed. When buying before the birth, 0-3M is the safer choice since most newborns grow through NB within the first few weeks. Babies typically stay in each size for 2 to 3 months. When your baby is near the top of a size's weight range, size up. A slightly larger tee wears longer before the next size is needed.
For a full size chart with chest and length measurements across NB to 18M, read the baby tee sizing guide.
When to Use Baby Tees
Baby tees work as a standalone top in warm weather and as a base layer in cooler months. In summer, a plain or graphic baby tee is the most practical choice for daily indoor and outdoor wear. In autumn and winter, a short sleeve baby tee worn under a zip-up sweatshirt or fleece bodysuit adds warmth without bulk. Baby tees also transition well from the onesie stage to regular toddler tops once children reach the 18-month range and begin to prefer separate tops and bottoms.
Baby Tee Fabric and Care
These baby tees are made from 100% combed ringspun cotton. Combing removes the shorter, coarser fibres from the yarn before spinning, producing a finer, smoother thread than standard ringspun cotton. Against newborn skin, which is more sensitive than adult skin, this produces a noticeably softer feel. All tees are pre-shrunk, so the size holds after washing. Machine wash cold on a gentle or regular cycle and tumble dry low. No special care routine is needed. The cotton is durable enough for daily infant wear and repeated washing without losing its softness over time.
Also browse baby onesies for snap-closure bodysuits and bodysuit styles, or the baby clothing hub for all infant basics in one place.