The refrigerator comparison also doesn't help much because American fridges are much larger then European ones.
State-by-state in the US, obesity varies between 35-50% IIRC.
There are also significant differences by race (black or hispanic highest, white non-hispanic slightly less, and Asian a LOT less).
If we're being honest, Europe has exactly nothing to brag about -- 1 in 5, or 1 in 4 obesity rates are still amazingly high. Just saying "not as high as the US" is a pyrrhic victory.