A Bronx barber’s customer took a little extra off the top, cops said Saturday.

A crook robbed the Foxhurst shop at gunpoint Friday night — but not before getting a haircut, police said.

Ramael Pierson, 24, walked into the shop on Westchester Avenue at 9:40 p.m. with two pals, and sat down for a trim, police said.

When the barber finished, the newly coiffed thug whipped out a gun, demanded money from the other customers, and fled, cops said.