I’ve been buying from pretty little thing for years and I’ve never had a problem but recently the sizing has been awful! I’ve bought clothing worth £60 and had to return them back twice because it didn’t fit me and that was using 3 different sizes, I email them and they told me to ‘check the size guide’ I bought clothes in a size 12/14/16 and not one fit me? So I don’t think a size guide is relevant. The delivery is always on time or before the expected delivery date. However the courier service is awful and quite a few times they have ‘lost’ my parcel or when they go to deliver it they will leave it outside my front door for everyone and anyone to see or take it. The returns process is easy and you only wait 14 days for the money to enter to your bank account.