I’m 290 5’5 normally a 2x in tops unless the fabric is a little weird. This does not stretch in the arms. I sized up to a 3x because I knew the fabric would not give and still the arms are too tight where the shoulders start but the rest of the arm is super baggy. The back end of the shirt is the only part that has a stretchy part to it purposely. It’d be so cute if they had it in 4x so my arms could fit 😟