Those are 25" CGA displays but word of warning regarding buying from that seller (Portland Oregon area)... he has a very poor reputation in the Portland area for just throwing things together and not caring how long they stay running. Someone in the area had a house burn down after buying one of his cabinets and that cab turned out to be the cause of the fire. On the plus side he does have just about every game you could possibly imagine and if you wanted to go through one entirely and restore it then you'll likely be ok.
Best of luck,
Jason