Up to 5x, or really, any size you'd need it to be. You won’t believe the simplicity of this pattern! It is simply a linen stitch rectangle with a slit in the middle, which is then folded in half. The vertical stripes add a fun accent to this easy tee. Plus, AUNT LYDIA’S® Baker’s Cotton is machine washable, and so very attractive! There are instructions at the end of the pattern on how to add length to the top if you want it longer.