ARIATMen's Rebar M4 Relaxed DuraStretch Basic Boot Cut Jean

What’s the length on these and why is it not an option to select length?

What is the size 40 is it 40” waist ? And then what would the length be

Why do these not have a waist and length on the sizes? How are we supposed to know how long they are?

If I order size 36 what is that size is it the waist or leg ? I would like a couple pairs of 36w by 34l