Because the recommended image size is 570px*160px. If you want to know the size of the image you want, you can right-click the mouse and click "Properties" to view its size.

Just about the same size

If you want to have good-looking pictures, go to Baidu Signature Bar or Personalized Signature Bar. The address is as follows:

/f?ct=&tn=&rn =&pn=&lm=&sc=&kw=%C7%A9%C3%FB%CD%BC&rs2=0&myselectvalue=1&word=%C7%A9%C3%FB%CD%BC&tb=on

/f? ct=&tn=&rn=&pn=&lm=&sc=&kw=%B8%F6%D0%D4%C7%A9%C3%FB&rs2=0&myselectvalue=1&word=%B8%F6%D0%D4%C7%A9%C3% FB&tb=on