Alergard Lavender Box Sheet Size: Semi-double. I tried to put it on my futon mattress to make it one piece, but the thickness didn't match, so I gave up. I washed it, tried putting it on, and it didn't work, so I stored it with other bedding. I don't need it, so I'll give it away to someone who doesn't mind. It hasn't been used. The color is lavender, which is currently sold, and it's not very purple. It's more pinkish. I don't have any special rules, but please check my profile. m(_ _)m