Vibram FiveFingers Men's El-x Fitness Shoes

I've been wearing these for years in a size 43, can anybody please advise which size I should order from Amazon? Thank you in advance!

Can these shoes be used for weightlifting including squats and deadlifts

I am a size UK 5 Womens, is this size 5 same?

Just wondering on how good these would be for Muay Thai or kicking a heavy bag in general. I do a lot of twists on the ball of my foot