Because it is drafted for movement. Extra room goes into the chest, shoulders and back hem so reaching overhead does not pull the garment out of shape. It is meant to hang loose rather than sit close.

No. Sizing down gives you a short jersey rather than a slim one, because the extra room is drafted into width and length together. For a closer fit, choose from 2D Clothing instead.

On selected cuts, most commonly the Baseball Jersey, where the back panel is left clear for exactly that. Check spelling character by character before confirming, since the piece is made to your specification.

Collect chest and length measurements rather than letter sizes, and send everyone the size chart before you start. Then order the batch together so it is produced in one run.

A baseball jersey has a full button placket and ribbed trims, so it can be worn open over a tee. The jerseys on this page are pullover and V-neck shapes with fewer fastenings, closer to a training top.

Fasten the buttons first if it has them, then cold wash inside out and hang dry. An open placket tangles in the machine and stresses the button seams. Reshape ribbed collars by hand while damp rather than with an iron.

A Hat adds no sizing decision at all, which makes it the easiest addition for a group. For a layer over the jersey, see Baseball Jackets.