There is no such thing as one size fits all. Well, there is, but I think you can guess how I feel about that. Glove manufacturers are finally responding to the need for odd sizes, both very small and very large so there should be no excuses. Almost every size is available off the shelf. Throw away worn, torn, or holey gloves promptly.
Gloves are extremely specialized today.
If you are allergic to latex, make sure there is none in your glove. If you like the powder that comes in some of the gloves, great, but keep in mind that people may be allergic to that too. If you need good sensitivity, make sure the gloves are extremely thin and form fitting. If you need dexterity or are afraid of dropping things, get gloves with gripping dots. Then, you need cut-resistant gloves made of kevlar and other high tech materials.