The phrase "straight pants" refers to a style of trousers or pants that have a straight fit with no tapering or flaring at the ankles. They are designed to be straight and narrow throughout the leg area. Full definition
I'd suggest though to go for straight pants rather than slim as you want some balance at least. (thefashionfolks.com)
Stay stylish, even when you have a lot to do for arranging the perfect party, with this pretty pastel pink cardigan and a stripped straight pant. (outfittrends.com)
It's advised that petite women choose one color straight pants, preferably something not too dark but they should be longer than your ankles. (heduy.com)