Current prices are Adult $19, Child $15, Gel/coloring/Pixie Dust only $7, Child's First Haircut (includes certificate and embroidered ears) $18. (The reason for the extra charge is some idiot Guests had complained that First Haircut children were getting the certificates and Ears free while others did not, so management decided to add the additional $3 charge.)
One important thing to remember at the MK Barber Shop. When they removed the old antique cash register and put in a terminal to allow use of credit cards and hotel charges and the like they hooked into The Emporium's network. The register, unlike ones in table service restaurants, cannot handle tips as part of the transaction.
So if you are planning on using the Harmony Barber Shop please be aware that if you are using any sort of card you cannot add a tip on the card and should have cash available for tipping.