Pumice firebrick splits measure 4 1/2" x 9" x 1 1/4" ; the most common size for wood stoves.
US Stove Company FBP6E FireBrick, 6-Pack, Cream, 3 Fl
Quadra-Fire Brick w/ Hole - Set of 2 - SRV436-0380
FBP6 Pumice Firebrick
Pumice Firebrick For Stoves and Fireplaces (6.5 x 1.5 x 1.25) PUMIC
US Stove Firebrick Universal Fit (6-Pack) FBP6E - The Home Depot
Mr. Heater Cleveland Iron Works FireBrick 6-Pack
Build an outdoor fireplace - The Shed
US Stove Company Pumice Wood and Pellet Stove Treatment in the
US Stove Company FBP6E FireBrick, 6-Pack, Cream, 3 Fl
US Stove Firebrick Universal Fit (6-Pack) FBP6E - The Home Depot