This is a good idea...even bigger would help but definitely for the beginner veggie garden. The solid bottom is helpful.
My dream is to trench and lay wire fencing fabric in it and then bring it up ( sharp angle ) and secure it all around with in ground cemented posts. The weak spot would beinder the gate.themeshwould keep the moles out tho!
Deer can jump well over 8 feet from a standing position.
But they don't like to jump into small enclosures or where they are unsure of footing as others have said. What they don't like to do is step on grating of any sort. I thought about laying metal chainlink fencing panels around the garden perimeter ...but that won't stop critters other than deer...and it is not pretty. I guess there is better and more pleasing grate materials I could hunt down. Anyway, the farmers here tell me..go with 8 feet and on the four corner posts string a wire or rope or something to attach tin plates to. That keeps the deer out.