REGULAR WHEELS STANDARDIZED SIZESThe Regular Wheels Series is the only one that used standardized sizes for their boxes. Seven different sizes were used and are summarized in the following table:This table shows which sizes were able by box types, as well as the dimensions in inches and millimeters. Every size has the same heigth (1,5 inches, or 38mm)Here are a few examples of the different size used on Regular Wheels: 50B coming in size 4 and 3; 25C in size 5 and 7;B type boxes used 4 different sizes, as illustrated here:OTHER SERIESMajor Packs, Accessory Packs and King Size boxes come in a all different sizes, as most of those models have very diversified sizes and shapes. Therefore, no standard size exist, although some dimensions are more common than others. The Yesteryear Series is more standardized, but they will be covered on this site in a future update.