Those unfortunately don't fit all window sizes. If you need custom sizes, a company called BlackoutEZ makes the same product but let's you pick the size. I can

Those unfortunately don't fit all window sizes. If you need custom sizes, a company called BlackoutEZ makes the same product but let's you pick the size. I can attest to these blackout covers making daytime sleep not hell. I don't even need zolpidem to fall asleep anymore.