perfect condition bike. I bought for my son two years ago but he barely used them as had a leg fracture and recovery for a year. It has maybe 300 miles on it. Probably less. Selling with kickstand, anti theft skewer in front wheel and in seat post.
I believe this is size M. Will work for anyone 5’6 to 5’11. My son outgrew it.
This is a very nice bike, specs here https://choosemybicycle.com/blogs/expert-reviews/btwin-riverside-500-disc