Most of those item specifics can be missed, not filled in, it's the one or two at the top stating ' Required' which are mandatory to complete.
However, try and fill in any which are applicable , you'll find the majority can be skipped, as these key words, help buyers find your items quicker.
One tip, I know it takes time, but add all measurements, chest, length, leg length, whichever applies, as this then will lessen the number of does not fit / item not as described cases you'll receive.
Just stating small, medium large, all Brands stores have different sizings, you're open to returns by just giving those details.
