What size is the pillow and will my pillowcase fit? Simba - Odyssey January 23, 2018 13:44 Follow Any standard pillowcase will fit just fine, the exact measurements are W40cm x D64cm x D 15cm Related articles Do I need to use covers? How do I use my Simba Mattress Protector? Can I buy the protector in John Lewis? Can I expect any softening over time? How firm is the pillow?