Defender - what size spare wheel cover?

[ajprice]

What size spare wheel cover would this Defender need for the wheel on the back? No idea what the tyre size is but its an LR alloy with off road tyres, picture attached (apologies for shakycam blurriness!). It's Christmas present buying time, and to ask for wheel or tyre sizes or going to their house and looking at the tyres would raise suspicions just a little bit. Looking for the soft vinyl type of cover, not the hard plastic case. Any brand I should look for, and how much is too much for a vinyl cover?

Thanks

[300bhp/ton]

Well let's think about this logically. The bigger the tyre, the bigger the cover you'd need. So that means, knowing the tyre size is somewhat critical

However standard LR sizes are 235/85R16 and 265/75R16. So while that isn't a standard fitment tread, it is likely it is one of these two sizes. But now way to tell for sure from the supplied photo.