This is a 55mm CHONK Senior. 
 
Submerge your game in the beauty of the deep sea with Ocean’s Depth, a striking blue 55mm d20 filled with enchanting bubbles.
 
While this massive die is perfect for rolls, it shines even brighter as a display piece. Its silver numbers gleam like sunlight reflecting off the water’s surface, and while the bubbles may add a touch of unpredictability, the shock factor at the table is guaranteed.
 
Ideal for DMs wanting to make waves during key moments in their campaign.

Each order includes a single 55mm d20.
The smaller die shown is for comparison only and is not part of this listing.