Free Pattern: Simple 2-Needle Slipper Socks

I first made a pair of these slipper socks in early 2005 when my husband (then my boyfriend) asked for a pair. After a bit of experimentation I came up with this really simple pattern that is knit flat and then cleverly folded and seamed to make the slipper/sock shape!

This is the original pair of slipper socks I made for my boy. Its a terrible photo though, so I'm mostly using the more recent shots of my pretty green socks!
Because they don't require a lot of yarn, they make an awesome stash-buster project. You will need approximately 100g of worsted-weight yarn to get the results pictured here! They can be made very special by using a really luxurious yarn or embroidered embellishments and make a great, quick-to-knit gift as well.

These intructions make about a size 7 - 10 (women's) slipper. If you are interested in test-knitting a larger or smaller size for me, please email me to let me know so I can add more sizes to the instructions! Eventually I plan to create a PDF of this pattern for download on Ravelry and it would be nice to offer more than just the one size.

Yarn
For the pair of green slippers I paired a lighter worsted-weight yarn with a strand of kid mohair for a little extra fuzz and depth of colour. Using two strands of similar coloured yarns held together have a beautiful effect, as you can see in the photos.

Green version:
2 balls Knit picks Wool-of-the-Andes, 100% Wool, 110yds/50g. Colourway: Grass.
Approx 25g of Fleece Artist Baby Kid (discontinued, but any baby kid yarn will do) Nylon/Baby Kid Mohair, 1093yds/250g

Grey version:
Approx 100g of Red Heart Worsted. 100% acrylic, 835yds/454g.
Scraps of random green acrylic for edge detail

Tools
Size 7 (4.5mm) needles (or size needed to obtain gauge)
Tapestry needle

Gauge
23 ST and 24 Rows = 4" (in pattern - K1 P1 rib)

Directions
CO 21 ST
Row 1 (ws): *K1 P1* Repeat to end of row
Row 2 (rs): *P1 K1* Repeat to end of row

Repeat these two rows until you have a 21" length.

Fold and pin the strip as in the diagram below, with the right side facing out. Seam along both sides (purl stitches) and the seam should practically disappear.


You will end up with a folded shape like this:
After seaming, squish and shape the slipper sock until you have this sort of shape:
A sock-blocker helps to shape these, but isn't absolutely necessary -- just putting them on your feet will do.

And, you're done! The ribbing makes these flexible, stretchy slipper socks, but keeps them snugly in place when they're on.