Poker size of 2.5 x 3.5 inches,

 

Bridge Size 2.25 x 3.5 inches

 

Miniature sizes

 

Index Card Size 3 x 5 inches,

 

Standard Tarot 3.5 x 5 inches,

 

Standard Tarot 2  - 3 x 5.5 inches,

 

Standard Tarot 3 - 3.5 x 5.5 inches,

 

Narrow Tarot  -  2.75 x 4.5 inches,

 

Jumbo Tarot - 5 x 7 inches

 

Super Jumbo 0 8.5 x 11  inches to name a few.

 

Your custom tarot cards do not need to be limited by size in any way.