There is no best in our product but only better.<br /><br />Size：(CM)           S          M          L          XL        XXL<br />     CHEST         92-94      97-99     102-104    106-109    115-117<br />     <br /> pregnancy  US      2-4        6-8       10-12      14-16      18-20<br />     UK             4-6        8-10      12-14      16-18      20-22<br />Material:Cotton，Polyester<br /><br />Customer notice: <br />We generally use the EUB for US customers， the average delivery time is 10 days.<br />Facing European customers， we usually use China post registration packet， the average delivery time is 25 days， individual countries may delay fed with 35 days. Other countries use a unified China Postal registration packet and delivered according to the actual situation in your country