Gemstone dice are fragile, so I recommend that you can roll them on something with a soft surface, like a soft wool felt dice tray. You can also search the solf tray on the store :) And if you purchase more than 2 sets (include 2 sets) of dice, you will get a dice tray for free! Details- 7 pcs of Obsidian Gemstone Dice- Each dice is well weight and well balance  'Only 1 D20' : It will comes with only 1 dice(D20).'Full Set of Dice' : It will comes with 7 pieces of dice(D4, D6, D8, D10, D%, D12, D20)'11 pcs of dice' : 11 pieces of dice come with a full set of dice(7 pieces) and an extra d20 & 3 additional d6. Size of each dice:D4 = 16 mmD6 = 16 mmD8 = 16 mmD10 = 16 mmD% = 16 mmD12 = 18 mmD20 = 18 mm Order's Processing Time: All the products are handmade items, so each order will take about 1 - 2 weeks to process before it was shipped out, I just hope you guys know that I will make them with my heart and passion. So I think it is worth to wait :) But if you have any questions about the order, please contact me by email, I will let you know each detailsof you order.Estimated shipping times： US orders:Regular shipping time is 8-10 business days to arrive.Other Countries :Regular shipping time is 10-18 business days.