Don't see the reason for the OP's question...I can get something that large in mine no problems..... 
OP must have bought the wrong Golf... 
It's not the size, it's how you use it. I just have to contort mine into weird shapes and it's fine.
Bloody IKEA. Best thing about lockdown is that Mrs G doesn't drag me to that seven levels of hell!
I really hope they keep this click and collect thing. Not sure if they had it before lockdown. I know what I want, just give me it. I don't want to keep doing the Ikea grand tour.