Awesome find with 4 retro diahware!  Skyline, Black Lines, Yellow Background desccribes this pattern just right!. No two dishes are a like with the pattern being random. Each plate is 9½" wide.
Pattern: Spiderweb Yellow by Blue Ridge Southern Potteries. This pattern and color are highly sought after, and Yellow is rarely won. 
Blue Ridge dishware was established in Erwin, Tennessee around 1916. These plates show no chips, nicks, cracks, severe scratches or stains.  There are some pottery related areas that do not affect the use of the plate.