I did the linen room purge last year. OMG I had so much but could never find anything, but in my defense this is a two family house so a lot came from previous homes
2 King size, 1 double, 3 single beds,a childs bed and three bathrooms
Whittled it down to 3 sets for us, 2 sets for every other bed - and thats full sets from mattress/pillow protectors to covers
Five bath mats
Towels, we dont use hand towels other then in the kitchen, and we both have a bath towel and sheet each, plus I have enough sets of two for the amount of bed spaces as well as dog towels and beach towels. Mum sorts out her own towels and keeps hers elesewhere
Tea towels I have a mountain of. As a PP I use them as kitchen cloths so can get through 3 or 4 a day
And four spare/extra pillows
I do have to have a lot as its our house the rest of the family descend on and usually all beds and bathrooms are in full use from Easter ( have 5 coming Easter week ) through to the end of summer and then over christmas and I just like to have everything at hand and not be rushing with washing inbetween guests