sewing the sleeve seams

I begin sewing on sleeve seams at the cuff. Here I employ the mattress seaming.
Once the cuff has been sewn I move to sewing the underarm.

Here also I employ the mattress seam.

By sewing the cuff and underarm first I ensure that the sleeve seam will not have puckers. Puckers caused because the sleeve was not properly lined up.

Then I turn the sweater inside out. Many knitters continue to use the mattress seam. I don't. Instead I use a tailor's seam. More on the tailor's seam when we sew the body of the sweater.

Now we have seamed our sleeves.

Next post: Seaming the body of the sweater.