KickersMen's Fragma Slip On Moc Toe Comfortable Leather Shoes

I am normally a size 41 so bought a size 7 but couldn't get my foot into the shoe. It isn't available in a 7.5 so what size should i be buying

Is it elasticated at the top of the sides, so it stretches a bit

Are these perfect fit. Or small fitting?

It says free delivery. But is adding on delivery charge at check out. Why?