3 cm by 4 cm<img src="http://gdetail.image-gmkt.com/734/717431541/2016/8/5c80c355-95a7-4d56-8ada-6ec114041431.jpg" undefined="" width="940" height="1336"><br><img src="http://gdetail.image-gmkt.com/734/717431541/2016/8/027bc621-9248-4eef-bb66-3b33a86ded12.jpg" undefined="" width="940" height="1336">