I am 6' 1" size 18. Bought the large size which says 16 to 18. It's a snug fit but then it needs to be for kayaking. I could have done with an extra inch or two in the body length as it did rise up on occasions, particularly after capsizing and getting back in the kayak. The sleeve length was perfect and I do have long arms. Great for a tall woman to be able to get some feminine sport wear. Would have liked some more choice as when I went to buy a rash vest it was the only design available in my size/length.