This is the perfect tool to be able to scoop up something from a sack or large bucket or similar and then pour that contents into something smaller. I use it to refill the bird feeder, just scoop the food out of the sack using the wide end, carry the food to the feeder and pour it in using the narrow side. It can be used for any type of animal feed that comes in large packs. The wide end has a diameter of 120 mm and the narrow end is 30 mm. I printed it in translucent petg with a fuzzy surface that gives it a nice texture and you are able to see how much stuff is in it.