Striking cobalt blue glass with lines pulled in the hot glass. The lines are on the interior of the glass and can not be felt but can be seen. These exquisite cufflinks are dting to be worn! They are handmade and signed by contemporary glass artist, Kathy Seff. This pair of cufflinks measures 3/4" x 5/8" and arrive in a navy blue gift box so they are ready to wear or give to that someone special.