^^ Thanks for the explanation.

Someone please help me with the sizes of different transaction. Assuming 2 inputs and 2 outputs:
Basic - 438 bytes (https://bitcointalk.org/index.php?topic=1782523.0)
P2SH or Pay-to-Script-Hash - Same as P2PKH?
Multisig -  ?? (
RETURN - ??
Non-standard -  ??


And additionally, how much space if any does Segwit transaction save over the current ~ 438 bytes?