I think it should be fine if we follow the size requirement of Canadian passport photo, which is 50 mm wide X 70 mm high.
-sailor(Mountains&Ocean);
2012-5-22(#6022883@60)
2×2寸 or 47×33mm are fine,as long as it's good guality.
-apple888(Horn);
2012-5-23(#6022884@60)