I would say the small looks better on your frame. I am 5 feet borderline 5 ft 1". I purchased the cruise 2016 iridescent boy in old medium and a little sad now because I find it too big for me even though I love the bag itself I wished I had chosen the small. So this season I decided to get the square mini as my crossbody bag. I posted a pic of me with my bag on tpf and someone thought it was the new medium.... Oh well I am happy now thought that I was able to purchase this seasons square caviar mini's! Good luck with your decision 
