Details
They simply hang from the cage bars.
Approximately
Small 65 ml (2 oz - 2-3/4" wide x 2-3/4" high x 2-3/4" deep);
Medium 130 ml (4 oz - 3-1/2" wide x 3" tall x 3" deep);
Large 195 ml (6 oz - 5" wide x 3-1/4" deep x 3-1/4" high)
They simply hang from the cage bars.
Approximately
Small 65 ml (2 oz - 2-3/4" wide x 2-3/4" high x 2-3/4" deep);
Medium 130 ml (4 oz - 3-1/2" wide x 3" tall x 3" deep);
Large 195 ml (6 oz - 5" wide x 3-1/4" deep x 3-1/4" high)