from Model Expo
Barrels came in many different sizes. Each had its own name, ranging from small "firkins" for butter, through "casks" for water and salt meat, and huge "tuns' for wine. A ship's size-it's "tonnage" was based on how many "tuns" of wine it could carry.
Dimension is height x width.
Walnut /35/64 X 15/32" /14 x 12mm /6 per pack