sample sizes & prices: curved curb 10x20x50 cm, corner 10x20x10 cm — 62 thb/piece square curb 6x20x100 cm, corner 6x20x15 cm — 87 thb/piece curved curb 15x30x100 cm, corner 15x30x15 cm — 161 thb/piece square curb 15x30x100 cm, corner 15x30x25 cm — 161 thb/piece