Single post in Site Skins: How-To, and Helpful CSS

I'm trying to make illumise, volbeat, and illumise eggs stand out in the shelter... make them bigger... I tried the css on here and it doesnt seem to work for me? the css that aligns shelter pokes worked, so idk why making them bigger isnt.. I'm using my phone if that changes anything? someone else has prolly had this problem, I tried to look but 200 pages is insane lol