照片尺寸: 50mm x 50mm Below FYIThe photographs should be: Of you, on your own2" high x 2" wide (50mm square) Two identical printsRecent(taken within the last six months) showing current appearance Taken against a white, cream or light grey plain background, so that features are clearly distinguishable against the backgroundIn sharp focus & clearHave a strong definition between the face and backgroundNo shadows on faceYour full face, looking straight at the cameraA neutral expressionEyes open & clearly visible (without sunglasses or heavily tinted glasses)No reflection on your spectacles, the frames should not cover your eyesNo red eyeNo hair across your eyesYour full head, without any head covering, unless it is worn for religious beliefsA close-up of your head & shoulders so that your face covers 50% of the photographThe head (measured from the top of hair to the bottom of chin) should measure between 1" and 1 3/8" (25mm to 35mm)The eye level between 1 1/8" to 1 3/8" (28mm to 35mm) from the bottom of the print.

50*50毫米. 白底.

1、办理去美国签证需要50×50毫米的白底彩照。

2、每个国家的大使馆对签证照片的要求不一样,最常见的为护照照片,即两寸白底彩照。 而有一些使馆对照片的颜色、尺寸、清晰度都有详细规定，如：印度需要4*3.5的蓝底彩照,美国需要5*5的白底彩照等。

3、签证（visa），是一个国家的主权机关在本国或外国公民所持的护照或其他旅行证件上的签注、盖印，以表示允许其出入本国国境或者经过国境的手续，也可以说是颁发给他们的一项签注式的证明。概括的说，签证是一个国家的出入境管理机构（例如移民局或其驻外使领馆），对外国公民表示批准入境所签发的一种文件。