I returned the size 1 for a size 0, and I was afraid the 0 would be too small. It is perfect. The fit around the ribcage is snug and my boobs JUST fit into the cups, but there is absolutely NO movement when I run. I'd like to add that the quality of the Enell bra is superior to any that I have owned before (and on average I spend 60$ per sports bra and have always purchased the major players).
Don't hesitate to purchase the Enell if you are looking for a hardcore, hoist-'em-up, pack-'em-in sports bra. I can't imagine purchasing another brand after this.
Arabella from New York, NY