i picked mine at the very top end of my healthy BMI. i am a broad shouldered muscly girl, so i think i will be happy at the top end of my BMI, but i don't know really as the weight i am now is the smallest i have been since i was about 14. I might get to BMI 24.9 and think i can lose another stone, and do that through excercise. i don't think the BMI is the best tool to use but i am using it as a guide only.