Jana Kucova is from the Czech Republic. She began her porn career around 2005 in a couple of german films under the name GG Jane. In 2006, she changed her name to Jana Kucova (or just Jana) and began appearing on US and British sites.
She seemed to have disappeared during 2007 and coming back in 2008 under the name Sienna Sweet.
Jana is 5'5" and measures 36-29-40. Her measurements have varied slightly during the years with her boob size going up or down the most. Jana is one of those lucky girls that carries most of her weight in her tits and you can see her go from a full firm D to a great jiggly DD cup.