Custom sized - typical vinyl quality.
Note in the product description that these are 'component built'. While you can get the size you want and need, the tradeoff is that the shutters are not one piece, rather several pieces made or cut to size to get to your custom size. The pieces are stapled together. They hang like other vinyl shutters and from a distance, if properly installed, don't look too bad - nor do they look real great either. I am concerned about longevity and durability given the several pieces used to make one shutter, (and being in Michigan the heaving from freezing and thawing... time will tell. I am also concerned about bees given the several openings they will have to get behind the shutters. Again time will tell. A bit expensive for the custom size, if you can make the standard size work - I would suggest it for the one piece nature of the construction if nothing else.