Does anyone actually use the top sheet or pillowcase included in the pack??

I have some gorgeous Bubba Blue linen packs of which I've only used the fitted sheet, is it possible to sew the flat sheet into a fitted sheet?

Oh, and where do you buy pillows that actually fit into that teeny tiny pillowcase?!

I use Kiddopotamus wraps for wrapping so flat sheets aren't used for wrapping by us if you were thinking of another way to use the flat sheet.

TIA!