I made this at the request of a crocheter on Ravelry who saw my originial (knit) finger sweater and asked for a crochet version pattern.
Pattern is for size 9 finger, but can be easily adjusted for your finger and yarn. Just size by loosely wrapping the foundation chain around your finger before proceeding and adjust accordingly.
worsted weight yarn (I used Red Heart Super Saver in Wedgewood.)
Row 1 - Without twisting chain, sc in first ch of foundation chain (mark first st in row if it helps you), (1 sc in each ch) 10 times.
Work in continuous rounds now and throughout.
Row 2 - sc 11.
Row 3-5 - Repeat row 2.
Finish off, weave in ends.