My favourite 3D mousepad. =D
This Kobato Oshiri Mousepad is by Taiwan doujin group 萌少女領域 (moesyoujyo) of whom I am a huge fan of. This was sold at Winter Comiket 81 in 2011. As with most doujin items sold at comiket, the quantity is very limited and very hard to find after the event. This artist who drew this is called 丁未 but unfortunately not much of his/her work can be found online. He/She has a pixiv account but very little artwork uploaded there.