I know Ikea offer some EU mattress and sheet sizes, but we bought some single beds and a king size and got sheets at the same time. Sheets and mattress paperwork claim they share the same dimensions, but the sheets are all baggy.
I added the sheets to our order unilaterally and when they arrived my wife said immediately, Why did you do that - they're always baggy. We've made that mistake before."
Does anyone own any tightly fitting ikea sheets? What's the secret? Do they need a very hot first wash?