width
Specify the width for the output image measured in pixels.
If only width parameter is specified without defining the height (with height parameter) the output image will be resized according to the specified width not altering the original image aspect ratio.
height
Specify a width of 600 pixels with width=600 param:
600
width=600
GET https://assets.imglab-cdn.net/flowers.jpeg?width=600 x px
https://assets.imglab-cdn.net/flowers.jpeg?width=600