Here’s a standard portrait photo size from Striking Places Photography. The measurements, in pixels, are 2048 x 3077. This is an aspect ratio of 2:3. The height is one and a half times longer than the width. You can have any aspect ratio you like! 🙂
Before the photo was uploaded to this WordPress website the size was 1.2 MBs
When I download this photo from the website by right-clicking and saving as..
Here’s what it looks like on a Mac when you right-click on this kind of photo.
It has presented the photo on the page as the same shape or aspect ratio but reduced it to 1704 x 2560 pixels and 762 KB. So, as soon as it is presented on the website, it has a reduced size.
If these file dimensions are too large for the purpose. Perhaps you’d like to show a photo of each person in a smaller size. You can still use the picture that was initially uploaded to the website, which is in your media gallery:
Here you can see I’ve taken a screenshot of the photo in the WordPress media gallery on this website. I’ve picked full size, but only 50%
Then if you want the photo to appear medium size, you can change it from the panel on the right. Where you have the option to resize:
When I download the medium size image to look at the image size, you can see from the screenshot below it has reduced the dimensions again to a selectable 200 x 300 pixels and the image size is now 35 KB.
You can choose the quality of the image and denote the number of pixels from within WordPress.
I will go to the smallest size possible now from the same photo in the media gallery to see how low we can go.
The size of this thumbnail is 150 x 150, so it’s square, of course. The size is now 28 KB.