The standard sizes of a Slim Kenter Shackle are the same as the regular kenter joining shackle, which are also the same as the standard sizes of offshore chain. The smallest ones start at 76 mm and up to 82 mm. The medium sizes of the Slim Kenter Joining Shackle start at 84 mm and go all the way up to 102 mm. The larger sizes, the biggest ones in industry are used on deep water operations, and start at 102 mm and end at 162 mm. But the most commonly used ones are between 120 and 122 mm, commonly used in oil rigs and drilling rigs.