Made half mittens. Here's the pattern.

Half mittens

*4,0 mm hook
* 1 yarn in any color you want * tapestry needle

Pattern

1. Ch 36, in the second ch from hook make 1 dc, 1 dc in rest of the chains, turn.
2. Ch 2, *1 tr in the first dc, 1dc in next. Continue from * until you finished the row, turn
3. Ch 2, now make a dc on the tr and tr on dc from previous row.
Make total of 8 rows if you want to make shorter sort or continue until you are happy with the length.

The finish top I made like this: ch 3, skip 2 dc, slst in the third, ch 3, skip 2 dc,  slst in the third and continued until the row is finished.

Now put the short side together and sew it together. Measure out where your thumb showed be.
Finished :)