When to wash baby clothes?

Riss • 29 • Happily married • Mommy to a 2 y/o boy and had our 2nd boy on 4/16 💕
I had my shower this past weekend and I'm not sure when to wash all of the baby clothes... I'm having a boy February 10th. Im thinking I should wait until my 35 week u/s so I can get a better idea of how big he will be.. I know some babies don't even fit into newborn clothes sometimes. What's everyone else's take on this?