Athletic, smart, and taller than people expect
Standard poodles are 40–70 lb and 20–24" at the shoulder — genuinely large dogs, and often taller than their weight suggests. The 42" crate fits most adults; internal height matters here because poodles are lanky and will duck in shorter crates.
This is a working retriever breed under the topiary coat. Standards need real exercise — an hour+ daily of running, swimming, or structured activity — and they're smart enough to invent problems if bored. Crate training goes smoothly if the dog is tired and mentally engaged; it fails miserably if you skip the exercise piece.