Now put One green pepper, Two medium-sized onions, Four pieces of bacon, through a food chopper.
Now prepare the following as a filling for four large or eight medium-sized onions.
Peel and cut in small pieces two medium-sized onions, and put them in a frying-pan on a gentle fire with two ounces of butter.
The above list will hopefully provide you with a few useful examples demonstrating the appropriate usage of "sized onions" in a variety of sentences. We hope that you will now be able to make sentences using this group of words.