I thought ours was a true king also, but not so. I already had these elastic sheet garters if you will. You connect them on the underside of the sheets on either side of the corner to pull the sheets tighter. You can buy a set at Target for like $4. Also doesn't help that most sheets are made for deep mattresses or deep pocket sheets for thick pillow top mattresses. I certainly wouldn't pay over $100 for sheets!
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