Glam - How to make all the featured images the same size
Update Slider Image Size
Navigate to Genesis > Slider Settings. Look for the Maximum Slider Width/Height option and adjust the number to a square, which would mean both numbers are the same. I would do about 600x600 here so that image doesn't get too large. I also would increase the amount of content that appears, now that the size of that image is quite taller than it is originally. Under Limit Content to ___ characters change this 100 to around 300.
This is what the slider will look like with these adjustments:
Update featured image size of first post
Navigate to your front-page.php file and remove all the following code:
Next, Navigate to Genesis > Theme Settings > Content Archives and set your featured image sizes there.