These pearls or beautiful and feel very authentic. The size is stated 7mm-8mm, but they are more of the 7mm. There are no stamps or labels on the authenticity of the pearls, but a great value for the price.<a data-hook="product-link-linked" class="a-link-normal" href="/White-Freshwater-Cultured-Pearl-Endless-Necklace-7-8mm-100/dp/B005LBB7XC/ref=cm_cr_arp_d_rvw_txt?ie=UTF8">White Freshwater Cultured Pearl Endless Necklace (7-8mm), 100"</a>