some can be quite small, best thing if he'll stand for you to do it is to reach there and see if you can feel 2 of them walnuts in side the little sack, sometimes they can be quite tight up to the body but you need both down for normal gelding otherwise it's more costly to find the other inside for removal. If he's cold they'll be held closer to the body but usually if he's warm they'll hang down a little easier to see/feel.