Why is std::bitset<8> 4 bytes big?

Question

It seems for std::bitset<1 to 32>, the size is set to 4 bytes. For sizes 33 to 64, it jumps straight up to 8 bytes. There can\'t be any overhead because std::bitset<

Answer 1

Maybe because it's using int by default, and switches to long long if it overflows? (Just a guess...)