This rocket had three bates grains (150g of candy propellant, only the outer surfaces inhibited). Each of them had an outside  diameter of 44mm, lenght of 70mm and 
15mm core. The nozzle (15mm) and endplug were made of airclay. The casing was glued paper, approx. 4mm thick and 300mm long. The whole thing with the stick weighed around 850g.

I wasn't able to get it back as the ice was too thin to walk on, but apparently the endplug failed and blew out soon after the rocket had take off, thus it only flew some 100m and fell on the ice.