We’ve bought from Secret Linen Store a view times, duvet, covers and pillow cases. Always good service and comms and lovely linens but our recent purchase of a sheet to fit Super King is just too small. It’s sold as a king/super king and would be great for a king. We have a standard size Super King mattress and thickness but the sheet is too mean in proportions (think they’re hoping it’s acceptable and save supply of a bigger sheet), but it comes untucked very very easily and is a stress every night. Would have changed but used and bought specifically to match colour of other products from them. Real shame.