BCC04ME (BCC M488 0000 1A 000 43X834 000) BALLUFF China ABA.B004ME B0404 0022___AiLianTe() USB B04A_435268.PDF Datasheet Download IC ON LINE. Size Chart Size Foot Length (mm) 38 246 39 254 40 258 41 266 42 270 43 278 44 282 45 290 Size Guide Tips All measurements are in millimeters. There may be a slight difference between your left and right foot. Please use the larger measurement when selecting your size. If you have a high instep or wide feet, we recommend sizing up. If you have a low instep or narrow feet, we recommend sizing down. We suggest measuring your foot in the afternoon, as feet tend to swell slightly throughout the day, giving you the most accurate fit. Fit may vary slightly depending on individual foot shape.