Here is a comparison of different stone molds concerning their size and price

 

 Slater    Hybrid  
SizeWeightPriceSizeWeightPrice
8 inches23 lbs$ 5010 inches35 lbs$ 75
10 inches42 lbs$ 6510.75 inches50 lbs$ 75
12 inches72 lbs$ 7912 inches65 lbs$ 80
14 inches75-157 lbs$ 8513 inches95 lbs$ 90
16 inches135-215 lbs$ 10914 inches115 lbs$ 95
18 inches200-280 lbs$ 11914.5 inches130 lbs$ 100
20 inches295-375 lbs$ 14515 inches145 lbs$ 105
21 inches315-395 lbs$ 17815.5 inches160 lbs$ 110
22 inches360-440 lbs$ 18816 inches173 lbs$ 110
17 inches215 lbs$ 120
18 inches250 lbs$ 125
18.5 inches275 lbs$ 130
19 inches300 lbs$ 140