Having bought clothes from Funky Buddha many times, I knew that you always buy one size bigger because it generally has tight lines. And while I wear medium, I got it in large. Plus, the description of the cardigan says regular fit. However, the cardigan is oversized and I had to exchange it. It's a nice oversized cardigan. In no way does it have a regular fit. So here, you should go with your normal size. If I may suggest, even one size smaller due to the oversized design.
Quality material construction although quite pricey. I don't think it's worth €50 as it is on Skroutz, let alone €60 as it said on the tag when the cardigan arrived in my hands, where €60 was its original price.