Stamps That A Old Chap Gave Me

Hi all I am trying to upload pics I have a image resizer on my tablet that will change the width and height what do I need to change them to on another forum suite I use 500 width and 700 height I will try this forum see how it goes
Thanks

Caretaker,
It's not about dimensions, its about file size. You may not be getting the image under 200k at 500x700 depending on the DPI of the image. If the site says you can't upload due to file size, then resize them to something smaller (try reduding horizontal and vertial by 25 pixels at a time) until it will accept your image. OR, if your software can save as .jpg and allows setting the compression, then select a higher compression setting (confusingly may be a "lower" number value though), that will make the file smaller.