French seams are a brilliant seam finish to have in your arsenal - the raw edges are tucked away completely out of sight leaving a lovely neat seam.
You can sew french seams around curves (such as armholes) although it’s slightly trickier so if this technique is new to you or you’re a beginner sewist then stick to using it on straight seams for now. This tutorial assumes you’re sewing with a standard 1.5cm or 5/8 inch seam allowance.
To begin with, you need to place your fabric pieces with the WRONG sides together. This will feel wrong but go with it!
Sew your first seam using a 5mm or 3/8 inch seam allowance.