For those last remaining litter crumbs, use one of these litter mats that grab all types of litter effectively.
Dimensions (pictured in this order):
Wide: 46 cm x 39.5 or 18" x 16"
Long: 49 cm x 32 cm or 19" x 13"
Standard: 42.5cm x 26cm or 17" x10" (Half circle) photo coming soon