This is a set of 20 pieces. There are some minor imperfections and scratches. For combined purchases, you will receive a 100 yen discount for each additional item. The ruler's smallest increment is 2mm. Thank you! ^ ^ #cabochon #decoration #parts #decopa #tradingcardcase #cute #handmade #materials #smartphonecase #accessories #crafts #materials #nailparts #elementaryschool #dollhouse #interior