Coming to you from Doc's Crocks is this Set of Six Sewer Tile Brick Salesman Samples for One Money.
 
From the bottom up are:
 
1. The Alliance Clay Products Co, Alliance, O.  Measures 3 5/8" long, 1 5/8" wide, and 2 1/4" tall.  As made.
 
2. Same as the above, but only 7/8" wide.  Although hard to tell manufacturing imperfections from chips, I think there are four shallow chips on the back edge (1/4" to 1/2").  
 
3. Bessemer Block, Youngstown, O.  Measures 3 1/2" long, 1 1/4" wide, and 1 3/4" tall.  As made
 
4. Metropolitan Block, Canton, O.  (all three N's are backward).  Measures 2 3/4" long. 1 1/4" wide, and 1 5/8" tall.  As made
 
5. Acme Brick.  Made as a paperweight with felt backing.  Measures 2 1/2" long, 7/8" wide, and 1 1/4" tall.  As made
 
6. The H. B. Camp Co., Aultman, O.  Stamped both sides.  Double hollow structure.  Measures 3" long, 5/8" wide, and 1 1/8" tall.  As made
 
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