Sleeve length and shoulder line on a long-sleeved T-shirt
Short answer: On a long-sleeved T-shirt the sleeve should reach the wrist, and the shoulder seam should lie at the edge of the shoulder. Then it sits right and feels calm when you move. Here is how to check both sleeve length and shoulder line before you choose.
The shoulder line is the starting point
The shoulder seam should lie at the outer edge of your shoulder, where the arm begins. If it sits higher, the T-shirt becomes narrow and pulls. If it sits further down the upper arm, it is oversized or too big. Either can be fine, but it should be a choice and not an accident.
Sleeve length from shoulder to wrist
Measure from the edge of the shoulder to the wrist and compare with the size guide for the long-sleeved T-shirt you are looking at. The sleeve should reach the wrist when your arm hangs and should not pull up when you raise your arms. See women's long-sleeved bamboo T-shirt.
Long-sleeved T-shirt and sleeve width
The sleeve should be wide enough for the upper arm and narrow towards the wrist without squeezing. A sleeve that is too narrow tightens and can leave red marks, while one that is too wide bunches at the elbow. Bend your arm and notice whether the fabric moves freely.
When the shoulder drops
If the shoulder line drops over the upper arm, the T-shirt can feel loose and worn. That can come from a size that is too big or a soft fabric. Check in the mirror whether the shoulders look intentional. If in doubt, choose a size smaller or a model with a firmer cut.
The fabric affects the way the shoulder falls
Bamboo clothing is viscose made from bamboo, and a thin, soft fabric falls differently from a thick one. That can make the shoulder line shift when you move. Read the material label and see whether there is elastane in it, which helps the fabric hold its shape.
Under other clothes
If the T-shirt will be worn as a layer, the shoulder line should not form an edge under the jumper. A shoulder seam that lies flat makes layering easier. Combine with bamboo tops for women or a top with wide straps if you want more variety.
Shoulder and bra
Bra straps can show if the neckline is wide or the shoulder seam sits low. Choose a bra that suits the neckline, for example a bamboo bra without underwire in a colour that does not show through. Check in the mirror before you go out.
Try it on and move
Put the T-shirt on, raise your arms, bend your elbows and turn your shoulders. Notice whether the sleeve pulls and whether the shoulder seam moves. Watch the length of the body when you raise your arms. A good long-sleeved T-shirt feels the same however you move.
Frequently asked questions
Where should the shoulder seam lie on a long-sleeved T-shirt
At the outer edge of the shoulder, where the arm begins. If it sits higher, the T-shirt becomes narrow, and if it sits further down, it is oversized or too big.
How far should the sleeve reach
To the wrist when the arm hangs down, and without pulling up over the forearm when you raise your arms. Measure from the edge of the shoulder to the wrist and compare with the size guide.
What do I do if the shoulder drops
Try a size smaller or a model with a firmer cut. Check in the mirror whether the shoulders look intentional and move around to see whether they stay in place.
