This post comes with a Warning - If you crochet these and gift them for a present, be forewarned they will then expect them every year.
The first year my husband and I were married I found a pattern in a crochet magazine for crocheted high top sneaker slippers. Being 9 months pregnant and as big as a house I passed the time crocheting them for his Christmas present. Little did I know I would be crocheting them every year for the rest of my life. Nor did I know the gifting would expand to all the men in my family and their friends. HEHEHE, at least I like to crochet.
But if you dare to commit yourself to crocheting this gift here's some free patterns for them in all sizes.
Sue's CrochetandKnitting.com has an adult size pattern here, http://www.crochetandknitting.com/sneakers.htm
She also has a children's sized pattern here, http://www.crochetandknitting.com/chsnkrs.htm
There is a baby sized Crochet Jogging Sneaker pattern listed here. http://web.archive.org/web/20040707084002/http://www.geocities.com/Heartland/6910/sneaker.htm
P.S. Please excuse my picture of my husbands slipper. He was sleeping so I had to swaddle my leg so you all couldn't see my hairy leg ☻