No, definitely not, because that size is smaller than the RWAF minimum size for normal-sized rabbits.
I have a 'large' rabbit, not really a giant, he should be about 3.7kg, and I feel guilty for keeping him in an 8x6 run. It takes him about three big hops to get from one end to the other - that's no life for any rabbit. He can't run or build up any speed in it, and he is not even a giant... I think contis are about twice his size. I try to let him out every evening for a run about.
You also have to consider depth and height - a 2ft deep hutch will not allow a giant to lie stretched out in any direction inside it, and a 2ft high hutch/run will not allow them to periscope fully - both the RSPCA and RWAF state that it is essential that a rabbit can do these things in their accommodation for their physical and mental health, as well as take 3 hops in a straight line..... I dread to think how long 3 hops is for a conti! :lol: