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 TIL Bitcoin Optech has a handy calculator for sizes of transactions of different types:


https://bitcoinops.org/en/tools/calc-size 
 Is segwit P2WSH? I forget. 
 P2wsh is one of the segwit types, the other is p2wpkh.

Technically, taproot (p2tr) is also segwit, it's segwit v1 not v0 
 Ok, so p2wpkh is the one I think I care about. 👍 
 It's the most common in wallets that aren't multisig yeah 
 I have a more customizable Bitcoin transaction size calculator here https://jlopp.github.io/bitcoin-transaction-size-calculator/