Item #70553 - DP The deck plates in 1/25 - 1/24 scale come in the following sizes. The Small deck plates are 18 mm long. Medium deck plates are 28 mm long, and the Large deck plates are 37.50 mm long. In the 1/16 scale the small deck plates are 28.50 mm long the Medium  deck plates are 44.50 mm long and the Large deck plates are 59.53 mm long.    All measurements are +/- 0.50mm approximately.