When laying a path with pavers, you have a choice to fill the gaps with grout, ground cover plants, or filler stones such as gravel or decomposed granite. As a Stone Chips pebbles seller and having experience from last 7 years, I often advocate filler stones , which are permeable (and prevent rainwater runoff) as well as a design element to create a coherent look for a path. Photo: Google Source Design rules for filler stones ? Think about scale. Assess how big your pavers are and how big the gaps are between them. Rule of thumb: The larger the scale of paving, the larger the filler stone can be. Choose a complementary stone. For instance, do you have recurring gray tones in your hardscape? If so, consider repeating these colors in your filler stone. ...