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Title: not 65 cm
Review: The ball is a pretty color and seems to be well made.However, I measured 65 cm on the wall, and I blew it up until the pump actually popped out (it couldn't hold anymore air), and it still wasn't close to a 65 cm diameter. At first I thought I was just doing a bad job extending a measuring tape out from the 65 cm point on the wall, so I measured the circumference (around the ball). The circumference was 174 cm, which would correspond to a 55 cm diameter almost exactly. That's a full size smaller! The ball itself says 65 cm on it. My knees point up when I sit on the ball, and they're supposed to be at a 90 degree angle, so the ball is definitely too small. I'm 5'6", and the instructions say the 65 cm ball is for people over 5'7", so it's definitely not right.I'll probably be sending it back, if I can ever get the plug out, that is! Otherwise, it's nice enough. On a side note, my ball came with two plugs, so I guess that means someone else's came with none.
