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I've always gone by the wrist rule, and at my height, I'm right on the cusp of medium/large frame. Also, going by the rule if your index/thumb meet around your wrist, you're medium, if they don't, you're large, if they overlap, you're small.
I don't believe in the finger overlapping rule. My wrists are 7 inches around it says large fame for me and my fingers touch. I just happen to have really long fingers!I've always gone by the wrist rule, and at my height, I'm right on the cusp of medium/large frame. Also, going by the rule if your index/thumb meet around your wrist, you're medium, if they don't, you're large, if they overlap, you're small.

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) i would like to say a size that doesn't cost extra to get.
Out of curiosity, I looked up what supermodels weigh as I assume they've gotta be in that area when they're my height... apparently they are on average around 127 lbs.