This field will only allow numbers up to 4 digits. For most classes, just write the number (ie, 49, 55, 61, etc). For 102 and 109, just write those. For superheavy categories, write as 0109 or 087. We will convert it to a plus. Note that 3 and 4 digit numbers will be less tall than 2 digit numbers because of the need to accommodate the width.