RW&CO men’s dress shirt

Worn a fair bit and I love it but it’s a little snug for moi. Some yellowing under pits and a small stain on the front that could probably come out if you cared enough to try (see pics). Feel like there’s some life left in it, if only for the hundreds of tiny birds that sacrificed their lives to be part of the fabric. R.I.Pigeons. M size, I’m a 15.5”/32-33 chest, fits me well if I don’t need to move my arms, sadly I’m finding I have to most days