Skinny snake/feeding troubles

Hi all,

So I’ve had my corn snake since February of this year and I have been feeding her pinkies every Thursday but she looks
thin. I fed her two pinkies two days ago and she ate them fairly fast. Besides that I don’t know how often I should feed her what size to feed her and how to help her gain weight and what weight she needs to be. Please help. I only want the best for her and so far I think I’m being a bad owner. And before you ask she has been doing extremely well besides this little feeding predicament. She’s had 4 perfect sheds with me and passes her food perfectly fine. Please help ASAP


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