We bought the mattress for a 69x99 cm Playpen, which is used with the grandparents of our daughter as a bed when our little one stayed there once. Fits very well purely because the foam pressed into the grid, there are no cracks. The mattress is not very thick and just sleep only pure foam, but now and then it better than in a travel bed where the mattress is fatter, but divided in the center and accordingly shaky.
