mfad•2y ago

Shirt Fitting Help

hi lads, just wanted to ask a few general questions regarding shirts!

For button ups that I intend to wear tucked out, I'm aware the hem should be around mid butt (right?). Are these shirts also appropriate to be worn tucked in as well? I'm concerned that the shirt may come out when I raise my arms.
My shoulders are vastly broader than my torso, and I have a polo that fits my shoulders nicely but just drapes over my torso. If I want to wear this polo tucked in, should I get the shirt altered to better fit my torso? There's currently a lot of excess material when I do so and it looks kinda ugly.

For context, I'm 5'5 (165cm) and weigh around 65kg with a fairly muscular build.

Thanks for the advice!