The pattern can be set to your gauge and size.
Several patterns can be used for the main piece, ribbing and the thumb.
The length of the wrist warmer from wrist up can be not less than distance to thumb base + 1cm.
You can set different lengths for thumb - full length, 3/4, 1/2 and 1/4 length.
You can set any length of the ribbing.
The pattern chart is shown in Firefox, Chrome and Safari. Unfortunately in Opera and Internet Explorer it doesn’t work right.
The pattern description is given at the bottom of the page.