Depends on how big your head is really. Tom Vader and NME both sell some buckets that are supposed to run fairly large over in the supply depot sub forum. I didn't know anyone who had one to try it on before buying, and I have an abnormally large head (size 8.5) and wear glasses, so I wound up scratch building mine, mostly from Home Depot buckets and bondo, link to WIP in signature.
Another thing you could try is getting a cheap pair of glasses (from a site like zennioptical) or using an old pair and mounting just the ffront frames of the glasses inside the helmet behind the visor.
Some helmets will also work if you turn your head to the side until you're past the cheeks (For some people). Or you can find a model and 3d Print a bucket, just scale it up till it fits you.
Important to note that it still has to be proportional with you, but I'm also broad-shouldered, so wasn't a concern.
