I give unlimited hay. It’s in her litter boxes, 1 in her pen and 2 else where in the house. I get hay by the bale so I’m not exactly careful about worrying about wasting a lot, so as a total guess I’d say she eats a little over a pile of her body size a day in hay.
Leafy greens I go over the norm, which I believe is something like a minimum of a cup per pound of bunny. Willow is 4 and half lbs and eats about 1/2 to a lb of leafy greens a day. Thats probably a lot more cups than is required. We give her some every time someone opens the fridge, or she begs and nips our toes while in the kitchen. I don’t believe there is really a limit to how much fresh greens they can get, making sure they get a variety and limiting some of them, such as spinach. Here is a list to help you choose which ones you can feed a lot of, and which ones should be limited. https://binkybunny.com/BUNNYINFO/VeggieList/tabid/144/Default.aspx
We have not started limiting pellets yet, because she is still growing. I’d say she eats about 2 to 4 tbls a day of pellets.
Other veggies and fruits-she gets little slivers as treats. That would be anything such as carrots, apples, banana’s, berries, cauliflower or broccoli flowerettes ect.
Willow has never been overweight in the least bit. Probably due to being a very active bunny and she enjoys leafy greens and hay moreso than higher density foods such as pellets.