At one time, I "assumed" that all cotton fabrics were 44-45" wide. They aren't.
(So did some clerks/associates in some stores, for that matter - even when the end of the bolt said otherwise
)
Anyway - check what the bolt end says for fabric width - and if you are a "wash before cutting" person - also check the width after you have washed the fabric and before you start cutting it.
This is more important if one does not have any "extra" fabric available and one needs to "plan ahead" before starting to cut.