A 1 1/2 inch pocket will accept a standard 3/4 inch flat curtain rod or a 1/2 inch diameter round decorative rod.
Our lace panels and valances usually have this size pocket.
A 3 inch pocket will accept a 2 1/2 inch continental
curtain rod or a 1 1/2 inch diameter round
Most of our curtain pairs have this size pocket.
Decorative rods should be used with tab top curtain panels and grommet top curtain panels.
Tabs and grommets do not hide the curtain rod.