I found this set of instructions on the internet. Hope this helps everyone!
You will need
2 pair of tube socks (the picture is childs tube socks - you can use any
size)
2 red buttons (3 for adult size)
1 green chenille stem
red ribbon for trim
white thread & needle
straight pins
What you do
Lay one sock flat and horizontal on your work surface, ribbing to the left. Lay a second sock flat and over lapping the 1st sock, with the ribbing to the right. This will form the arms. You want the overlapped portions to be about as wide as the body part of the socks.
Lay the remaining two socks vertically over the arms you have formed. The arms will be at the top, and the toe part of the sock will be at the top, with the ribbing down at the bottom for the legs. Use straight pins and pin the socks together along what would be the shoulders, being sure to catch the "arm socks" Pin the arm and side of the body
together also.
At the center where the two body socks come together, near the top fold down a little collar on each inside edge of the toe. With the needle and thread baste the socks together, around the body and arms, across the shoulders, down the other side, and on the back side across the back at the bottom of the arm pieces.
On the front center, tack the collar down. then baste the center socks together, adding the buttons as you go down. Continue past the arm sections a few inches, leaving a portion unstitched for the legs.
Make a small green wreath with the green chenille stem by wrapping it into a circle. Glue a little red bow on it at the top, and stitch it to the sock. Print out the poem (see below) on cardstock, using small print. Cut it out and add a little bow, pin it to the long johns. Purchase a little hanger, or fashion one from craft wire.
POEM
I made you some long johns
But they turned out too small
In fact I don't think
They will fit you at all.
So take off the buttons
And snip the threads
You will have two pair
of socks instead!