Excuse me, I want to upload a picture not larger than 120px in Taobao decoration shop. I made it with ps, and I can set the pixel (width) when adjusting the image function.

Hello, first of all, you need to know what is the picture size and what is the picture pixel.

Picture size: the display and actual size of the picture. Is its width and height.

Pixel size: "Pixel" consists of the letters of the words "picture" and "element" and is the unit used to calculate digital images. Like photographs, digital images have continuous shadows. If you enlarge the image several times, you will find that these continuous tones are actually composed of many small squares with similar colors, which are the smallest unit "pixels" that make up the image. This smallest graphic unit can usually display a coloring point on the screen. The higher the pixel, the richer the sample and the more realistic the color is. From Baidu Encyclopedia /view/575.htm In fact, simply speaking, pixels are the small squares and the smallest elements that make up a picture. The larger the pixel, the clearer the picture. The pixel size will only change the clarity of the picture and the memory size it occupies. That is, the larger the pixel, the larger the KB value of the picture, regardless of the size of its display and printing.

I don't know if you understand. Welcome to ask questions, thank you!