Pearl Izumi Knee warmers for bicycling & sports, black thermal fleece lining Size S. 
Unisex size small (see their website for size guide and my pics for measurements).

Lets you transform your shorts into much warmer and longer tights that leave part of your leg exposed. Soft thermal fleece integral to the inside. Stretches. Water-shedding performance. Logo on the back of the calf adds reflectivity in low-light conditions. Silcone grip helps keep them in place at top and bottom. Fabric is a blend of 56% nylon, 30% polyester and 14% lycra. 
Breathable and water-resistant treatment will bead light precipitation. Left and right leg fit for an anatomical fit.

Used probably twice. Great shape and work great.