The Size 2 models are MPN: 1097002 (Navy), MPN: 1099002 (Olive Drab), MPN: 1096002 (Black), and MPN: 1095002 (Khaki).
To find your size, you can look at the last two digits of the MPN. For example, MPN: XXXXX02, is for a size 2. The other sizes and their corresponding codes are size 0 (01), size 4 (03), size 6 (04), size 8 (05), size 10 (06), size 12 (07), size 14 (08), size 16 (09), size 18 (10), size 20 (11), size 22 (12), size 24 (13).