I have a row of hangers with my jeans, leggings and maxi skirt on, but I can never tell which is which just from looking at the hangers.

So I labeled each hanger. I didn't use hanging tags, though, I used my label maker. Unfortunately the labels kept wanting to peel off at the top and bottom where they curved around the hanger, so I went over each one with some clear tape. (And yes, that is a label on my label maker saying "My Precious". What can I say, I love organising.)

Even with both steps it takes so little time to make the labels and it's saved me so much time in figuring out which pair of jeans / pants is which.

(I have since added jeggings and skinny jeans to the mix as I slim down into the sizes that I have.)
I hope this idea is as helpful to you as it was to me!