I bought a "DAREVIE Cycling Jersey Long Sleeve Men Women Cool Technology Man Cycling Maillot Soft Breathable Quick Dry SPF 50" in size Euro M and it's TINY. I'm tall and slim (186cm, 70kg) and usually buy size M but this jersey is super short and my belly button is not even covered and it's very tight. I'd say it's an XS.
I also got some RION shorts with Dolomiti pad in Euro size M and although a little tighter than usual size M they're fine.

Just to show how small this size Euro M DAREVIE jersey is, here is a pic of it laid on top of a Pearl Izumi size M.

I've a pair of Santic Austin mtb shoes which are more gravel then full mtb. They have a single boa dial. They were advertised as carbon sole but it looks like generic black plastic and is definitely not carbon stiff. That said, they are comfortable and the sizing (size 45) is similar to Shimano or other shoes I've owned. They were also very cheap at about $50 from Santic Australia's website. They weigh about 375gm each and I've had them about 3 years and they're still in good condition.