I have no idea if the 54/55 colored "molded" floor mat was a small mat or a full mat, but another clue that supports the colored mat being smaller is the price. The price of the colored mat was a little less than the price of the regular mat. This leads me to believe that the colored mat was smaller. However, if the colored mat was a smaller mat, why would they have a different mat for 3-speed and 4-speed?

While I am pondering, I wonder why they had a blue, green, and brown mat, but no burgundy mat? Also, it looks like you were SOL for a brown mat in a 4-speed truck? Hydra-Matic equipped trucks would have used the 3-speed mats.