1. For Icons
File Format - png image Dimension - 462 x 462
2.For Wallpapers
File Format - jpg image Dimension - 1125 x 2436
3.For Widgets
File Format - jpg image Dimension - 544 x 544
4.For Preview：
File Format - jpg image Dimension - 1125 x 2436
5.For Source File
PSD, Sketch, Figma