Welcome to my store! We are bigger wholesale company in China. About pearls’ size: Usualy, the pearls’ size Will generate significant errors if you only use ruler or only use eyes to see and guess the size. The correct measurement method is use vernier caliper to caliper to measure them. If we named them as 8 mm, they should be more than 7mm for example 7.1mm 7.2mm…. If we named them as 9 mm, they should be more than 8mm for example 8.1mm. If we named them as 10 mm, they should be more than 9mm for example 9.1mm 9.2mm…. If we named them as 11 mm, they should be more than 10mm for example 10.1mm 10.2mm…. More question to see the following. Q: Are these real genuine pearls? Q: You say these are real pearls, why the prices are so low? A: We’re an original supplier, and we offer the finest pearls jewelry at very low prices. Q: Can l get my necklace or bracelet in a longer or shorter length? A: Yes, just tell us your prefered length, we can customize your item as your request. Price could be different since length changed. Q: I want to change another clasp, is it OK? A: Yes, we can offer some other available clasps for your item. Q; Do you wholesale? A: Yes, we’re an original supplier. We offer the finest pearls at competitive prices, and our handcraft is the BEST. Q:can you send combine invoice in different country? I can’t do this. The regulations do not admit of our doing that.