Cushion covers

Hello, 
Mrs Tiggs here. We've had our van for two years and I always put throws on the seats to try to keep them clean. As the cushions and armrests are still exposed I've made some machine washable covers for both as per the pics (hope they've uploaded, can't see them and don't know what I'm doing sorry). The cushions are just 15"/38cm square but if anyone is interested in having the measurements to make a pattern for the wedge shaped armrests please let me know and I'll attempt to post.