I think the title says it all. Depending on fit and length of a top I toggle btwn an XL & 2XL because of my bust. I am also 5'8" with narrow hips wearing a sz L or 14 pant. I purchased this top in an XL. Plenty of room to not hug all the wrong lumps and bumps, yet still look flattering (not like a tent). Also long enough (on my Frame) to hit mid to low hip to cover more of those lumps and bumps but not look "dumpy" as many loose fit shirts tend to do if you are large busted but do not necessarily consider yourself Plus Sized. I plan to wear this top with both tighter fit Capri length jeans or looser fit Linen Pants. Looks great with both.