
In my last post, I experimented by lowering the front crotch curve to match the back crotch curve level. This tweak helped improve the pants’ drape but led to a 1.2-inch difference between the front and back inseams. Generally, inseams should match, or the back can be a bit shorter—up to about 1/2 inch.
If you need to catch up, here are links to the previous posts:
- Part 1 – Introducing the Topo Pant pattern
- Part 2 – Adjusting the front side seam to make drapelines parallel
- Part 3 – Exploring the impact of leveling the crotch curve
Adjustments

This time, I raised the back crotch curve to the same height as the front. The result? Every balance check came out just right. Now, the front and back inseams are nearly identical in length, with only a small margin of difference.
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