bag is around 14 x 14.5. One yard = one bag.
It's bigger on the inside in a wibbly-wobbly sort of way. The outside of the bag is the Police Telephone information sign on one side and police box-style windows on the other. The straps are the Police Box sign. Lining is a pretty black and white floral swirl pattern. Coin pouch has the St. John Ambulance logo. The whiteness of your white depends on the fabric base chosen. The whitest whites are the poplin, sateen, and twill. The rest are varying degrees of off-white. The richness of the blacks also depends on the fabric base. The polyesters (silky faille and the performance knit) provide the closest to true black. (Sample fabric image shows one of the polyesters.) Cotton poplin is the closest to black of the cottons. The rest will print closer to charcoal gray or "off-black." If in doubt, order a test swatch.