Fitting Pants Strategically The Full and Flat Seat Adjustment

28 Does your pant muslin pull across the seat, sag in the back, or tilt at the side seams? This video will help you identify whether you need a full seat or flat seat adjustment—and walk you through how to make it. In this tutorial, I explain how to diagnose and correct one of the most common (and confusing) contour issues in pant fitting. Whether your pants feel too tight across the back or you’re swimming in excess fabric, this video shows you the exact changes to make to your pattern. What you’ll learn: ✔ How to assess if your seat is full or flat ✔ The visible clues in your muslin to confirm your adjustment ✔ How to calculate the length and width changes needed ✔ Step-by-step instructions for adjusting your back pant pattern ✔ Why the same slash lines work for both full and flat seat adjustments This is part of the Fitting Pants video series—designed to help you fit pants strategically, with less guesswork and more precision. 🧵 Download the Free Scaled Pant Block: https://www.inhousepatternsstudio.com... 📘 Need the Perfect Fit Guide? https://www.inhousepatternsstudio.com... 🔔 Subscribe for more advanced garment fitting tutorials:    / @alexandramorganinhousepatterns