What size lens cap would i need for this 4.5-94.5mm 1:3.1-5.8, i don't know so frustrating?

I have a sanyo e2100 which is the same size as the nikon l120… Please help, so frustrating geez lol

Take your camera into a proper cameras shop and have them measure it for you.

I don't think your camera was designed to have a lens cap. Most cameras, like my Nikon P7000, have a built in lens cover that opens when you turn it on. I suggest you get a camera case to protect your camera when you're not using it.