EZ Marker Grass and Gravel Delineators are a smart, simple and effective solution for managing parking lot traffic or to guide motorists around hazards. EZ Marker™ Parking Delineator. 2.7” hexagonal shape – fits NDS EZ Roll Grass and Gravel Pavers with 0.40” profile above paver grade. Available in 4 colors, white, blue, red and yellow.