As far as size goes I really can't remember what size it is however I do know it can be sized.....I might be able to take it to the jewelry store one day this week and I'll let you all know a size sorry I can't be further help at this time.....And no it doesn't have a 925 and I fanned you back =)
If its not stamped sterling silver,sterling,or .925 its probably not sterling silver,all bands have to be stamped by their makers for what they when they are made from either sterling silver,gold etc..