13cm The size notation (cm) is a guideline.   

   Grand Seiko Sports Collection 9F GMT SBGN027 9F86-0AK0 Men's #HD400. Condition: USED Item condition: New finished Movement point inspection used used A (band A) fine thread, bezel at 6 o'clock, there are some small scratches on the bezel edge, but there are no other major damage and it is newly finished. It is a beautiful item. Unused item with slight condition changes due to storage. Used items that have been used but show little signs of use. Overall, a good condition item. Overall also shows signs of use. Overall condition with noticeable damage. Accessories: Guarantee, ...

   SEIKO GRAND SEIKO Sports Collection GMT SBGN029 9F86-0AK0 #T340. Condition : USED - Condition (Google translation) - It is a used product with a feeling of use and scratches, but overall. Case: AB Belt: AB Item rank: AB. Items that are unused but have slight changes in condition due to being displayed in a stored. Watches, jewelry and other items that have been finished and have no scratches to mention. The bag is in near-unused condition. It is a good item in good condition, although it has some signs of use and scratches. The item is in good condition overall, although it shows signs ...