| The numerical code consists of four or five digits (depending on the color code that can take one or two digits). The units digit indicates the size of the pen, and with this also the overall size of the pen. For [[Carter Coralite Pen]] the number starts from size 2, the smaller, to size 7, the greatest. For [[Carter Pearltex Pen]] these measures start from size 2, the smaller, to size 8, the largest. | | The numerical code consists of four or five digits (depending on the color code that can take one or two digits). The units digit indicates the size of the pen, and with this also the overall size of the pen. For [[Carter Coralite Pen]] the number starts from size 2, the smaller, to size 7, the greatest. For [[Carter Pearltex Pen]] these measures start from size 2, the smaller, to size 8, the largest. |
| But for a given size of the nib there are variants in terms of length of the pen and of the diameter of the barrel, for which there are three different alternatives, which are indicated in the numbering from the next two digits. The tens indicate the length of the pen that it was available in three variants, long, medium and short, marked with numbers 1, 2 and 3 according to the table at right. The hundreds instead indicate the size of the body of the pen, this one made in three different variants, large, normal and small, with the numbers 1, 2 and 3 in the table on the left. | | But for a given size of the nib there are variants in terms of length of the pen and of the diameter of the barrel, for which there are three different alternatives, which are indicated in the numbering from the next two digits. The tens indicate the length of the pen that it was available in three variants, long, medium and short, marked with numbers 1, 2 and 3 according to the table at right. The hundreds instead indicate the size of the body of the pen, this one made in three different variants, large, normal and small, with the numbers 1, 2 and 3 in the table on the left. |