Yeah, it's hard to change one to the other because the sts are different. You can do something the same shape, and a similar texture though. They're done using 2 strands held together and the equivalent of a size 11 or 13 needle, or you could use a bulky yarn. There should be a few patterns for socks or slipper socks (also sometimes called house socks) and if you did them in seed or garter stitch or with the purl side of stockinette facing out could be a similar texture.
sue- knitting heretic