Material Crown, a brand dealing in silver accessories, have collaborated with Toei to produce jewelry inspired by Kamen Rider OOO.
The Combo Design Ring is a series of rings with three gemstones, colored to match all of the main Combo forms used by Kamen Rider OOO in the show.
Price: ¥15,120 each
The Ankh Broken Medal Design Necklace features a vague implication of a broken Core Medal, which is in reference to the finale of the show.
There is also an additional necklace not specified, but it also appears to be based on Ankh.
The Ankh Design Ring is based on the monster form of Ankh.
Customers are able to pre-order these items from Bandai’s online apparel shop, BanColle!, and the items in question ship in May 2019.
Source: Mantan Web