you are correct however if we put this in minecraft science it would be because there is little pressure due to gravity only affecting mobs and falling blocks, pressure affects how big a bug can get before being crushed by its own exoskeleton. also bugs require a lot of oxygen to survive and grow huge which is why earth had giant bugs way before land vertebrates (animals with a spine), back then there was not many land creatures to soak up all the oxygen, so the oxygen levels were so high that allowed giant bugs to survive. and there is infinite oxygen as far as we know as minecraft in pc version goes on forever. so technically speaking these spiders could grow much larger. however then they would destroy everything it they grew that large, so its not vary practical and with a large body you need much more sustenance, which mc spiders feed on animals like horses cows pigs... ect. which would make them a great natural predator in mc ecosystem. but hey thats just a theory a minecraft theory... no i am not mat pat but i do know my bugs. so why the heck not.

I agree! :D

I like the creeper you drew

Actually, If spiders were smaller in Minecraft, they might be harder to kill, because they have a smaller hitbox and would be able to get through every teeny hole. Just a theory.

I was gonna post that they are not as big as in de pic but u didn't mean that

hmm not just spiders are fricken fat as **** they also take two hits with a diamond sword or some crap like that, In real life with a real diamond sword they'd be dead in 5 seconds basically but minecraft is just a game. So it can be made up. But i guess if you hit a spider in real life with a diamond sword or some type of sharp thing it'd probably be stunned THEN die so... Yeh

i completely agree with you. at least cave spiders are smaller?