Errata

Sleeves 3rd size of the above pattern work as follows:

1st row: k2, then in order to cast off 2sts k another 2 and pass the 3rd stitch over the 4th then knit another stitch to pass the 4th over the 5th.
This uses 5sts to work the instruction k2, cast off 2.
With 87sts on your needle divided by 5 = 17 times with the k2 remaining.
Therefore 17 times you have lost 2sts = 34sts
87sts - 34sts = 53sts
The main sequence of the row will be a gap of 2 cast off stitches with 3sts in-between.