Make your own high-waisted jeans / pants using this sewing pattern. It has a button fly. It comes in US 0 - 18 women's sizes. This post also has 48+ other sewing patterns for pants. A great source of inspiration for clothes sewing project ideas.
DIY Split Leg Pants (No Sewing Required): I've seen these chic and stylish split-leg pants in a few stores and I love the look, so here's an easy no-sew DIY way to make your own. Enjoy! :) Full video tutorial: https://www.youtube.com/watch?v=EdLe8n0xao4