How do I resize my images using Dawn Template

Help!

Please see attached photos.

The dimensions of the images from left to right are:

4472 height x 2517 width ("FULL CIRCLES #5) and 4472 height x 3531 width (“mothers”).

I do not understand why on my website the image on the right (“mothers”) is so much smaller than

the other photo (I prefer this larger size).

How can I set up my images so that they’re all as large as the left image ("FULL CIRCLES #5)?

Thanks in advance for any advice.

Make sure to always use the same image sizes, then they will look similar in size.