The Lily mittens are part set of aptterns including matching hat and cowl, the patterns for which are both free.

Lily patterns have a pie crust ruffled edging and lace insets combined with smooth stocking stitch.

Each pattern in the set takes 1/2 a skein of malabrigo merino worsted so you can make any two patterns from a single skein.
Or you can use your preferred heavy worsted or aran yarns that give you gauge.

The patterns are one size with the lace patterns and insets making them quite stretchy.