The fabric is Urban Chiks "Swell" by Moda in deco weight, reinforced with fusible fleece. The inside of the bag and the pocket are lined with red/white polka dots. The button below is also vintage. A big, fat, thick, juicy little thing. The bag measures 12 3/4" x 21", so it's sizeable.
Craft sewing is not my strength but this bag pattern wasn't too bad. :) Thanks for looking!