Someone wanted to know the dimensions of the V-berth mattress, I forget who. Well, I measured mine today, and here they are: 17 inches across the foot of the mattress, 88 inches on left and right sides, and 84 inches across the head of the mattress. I was measuring so that I could make up a mattress pad, and - alas - I forgot to get the thickness of the mattress. I believe the thickness is about 5 inches.

These dimensions are for the new style Catalina 'inner spring' mattress, not a foamy. Of course there will be some variation between types of mattresses, so no guarantees that a fitted sheet of these dimensions will fit your mattress.