Soft Crate

What size cage for a golden retriever?
I'm about to buy a soft box for my dog agility classes. I wondered what size is good. She's not a big gold, which weighs about 60 pounds. There are two sizes: 36 inches long x 24 inches x 27 inches WH x 42 inches long x 28 inches WH 31 inches I will be moving this around a lot, so I'd go for the small one but I want to be comfortable. Thanks!
If the USDA, the dog has to have enough space to invite over all your friends, have a barbecue, go jogging, playing frisbee, and have area codes around 5. Here is Reality: Varikennel # 100 21 "x16" x15 "H, Actual CrateWeight: 7 kg cats, Toy Poodle, Yorkshire Terriers, Chihuahuas, Shih Tzus Varikennel # 200 27" x20 " x19 "H boxes Actual Weight: 15 Lb Beagles, Shelties, Min. Poodles, Cockers, Lhasa Apso Varikennel # 300 32" x22 "x23" H boxes Actual Weight: 18 Lb Springer Border Collies, Bull Dogs Varikennel # 400 36 "x24" x26 "H boxes Actual Weight: 23 Lb Boxers, Dalmatians, collies, Airdale, Setters, Aust. Pastores, Varikennel Dobermans # 500 40 "x27" x30 "H Actual Weight boxes: 27 Lb Afghans, Retrievers, Pointers, Shepherds, Rottweilers Varikennel # 700 48" x32 "x35" H Real weight boxes: 44 Lb Irish Wolfhounds, Newfoundland, Saint Bernard, Mastiffs, Greyhounds
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