Tapers

Basic Tapers:

In a 2½ thick brick a           
#1 Arch tapers from 2½” to 2 ⅛”
#2 Arch tapers from 2½” to 1¾”
#3 Arch tapers from 2½” to 1″

In a 3″ thick brick a
#1 Arch tapers from 3″ to 2 ¾”
#2 Arch tapers from 3″ to 2 ½”
#3 Arch tapers from 3″ to 2″
#4 Arch tapers from 3″ to 1″                                       

In 2½” thick brick a            
#1 X Wedge tapers from 2½” to 2¼”                              
#1 Wedge tapers from 2½” to 1⅞”                 
#2 Wedge tapers from 2½” to 1½”

In a 3″ thick brick a
#1 Wedge tapers from 3″ to 2¾”                    
#2 Wedge tapers from 3″ to 2½”                                    
#3 Wedge tapers from 3″ to 2″

View of basic firebrick tapers

Straights come in many different sizes including:
9×4.5×2.5, 9×4.5×3, 9×6.75×2.5, 9×6.75×3, 12×4.5×2.5, 12×4.5×3, 12x6x2.5, 12x6x3, 12x9x2.5, 12x9x3, 12x12x1.5, 12x12x2,12x12x3, 13.5×4.5×2.5, 13.5×4.5×3, 13.5x6x2.5, 13.5x6x3, 13.5x9x2.5, 13.5x9x3, 18×4.5×2.5, 18×4.5×3, 18x6x2.5, 18x6x3, 18x9x2.5, 18x9x3, 18x12x2, 18x12x2.5, 18x12x3 and many more!