I have a very weird phobia and I have not met anyone else who has the same as me. It is often confused that people think I dislike big or small things but it is not like that.
I get scared if something unusual changes its "normal" size.
For example,there are two lamps that are exactly the same but one is big and one is smaller. On my computer desk, I had the smaller one and one day it died and I had no more bulbs so my father brought the bigger one and I literally could not move and my mind kept tricking me that it grew. It took me a while to get used to these big bottles you see in some shops, I first refused to be near them. I even get scared by such things on games. Around five years ago, I was playing on a MTA roleplay/DM server and on the mini map there are radar blips and I was doing a job/mini mission and the radar blip was half the size of the mini map and I had to hide it in the end and continue the mission with guessing the route.
It isn't so bad now and I haven't experienced anything like that for a long while now.
I wouldn't say I have a phobia of spiders, I just dislike them but I have a phobia of bees and wasps. I run at least 20m from stopping if I see one of them. I remember when I was in Turkey last year on vacation, I saw a "dunglebee" I don't know how you spell it, it is like a bumblebee but like four of them in size and pure black, I never saw anything so frightening in my life.
When my grandma died when I was nine years old, I had a phobia of death/dying for a while, I refused to sleep and used to sit on end of bed looking/stare out of window hoping not to die, I only slept if my body was too tired to stay awake. Boy, they were hard times. I guess as a kid, you don't really know what is happening around you.