How big should a Minecraft bedroom be?

How big should a Minecraft bedroom be? Dig a few more blocks into the hill or cave wall, then you can dig a small room (8×8×3 is the most recommended. It’s not too small, but not too big.)

Dig a few more blocks into the hill or cave wall, then you can dig a small room (8×8×3 is the most recommended. It’s not too small, but not too big.)