The prototype frunk looked like it was about as deep vertically as the Model S single motor frunk is horizontally (into the microwave area). I could see golf bags standing up in the Model X frunk. My back hurt thinking about bending over the nosecone/front bumper at the waist to reach down into the prototype frunk, but a tall item like a golf bag wouldn't have that problem. (The prototype frunk was the same shape as model S frunk, minus the microwave. It was the shape I imagined the Dual motor frunk would be, before it was revealed that dual motor intruded past the microwave) We'll see soon if the final thing is anything like the prototype I guess.