The Jewelry Archivist ORIGINAL #1 SURGICAL & HOSPITAL GRADE Pregnancy Maternity Bio Flex Flexible Belly Button Retainer Nickel/Allergy Free - 16G/3mm balls ~~~SOLD INDIVIDUALLY~~~ Flexible & can be cut to any length (for best results, cut at an angle). These are NOT meant to be overly flexible, but flexible enough to grow with your tummy. 16G. 3mm balls. These are Surgical Grade with a Comfortable fit. Nickel Free Wire, Allergy Free. These will NOT cause an infection. ****MEASURE CAREFULLY & REMEMBER THAT THESE CAN BE CUT TO A SHORTER LENGTH!**** This is the one that *I* personally used during my pregnancy. The Jewelry Archivist ONLY sells body jewelry that has tested personally & love. Please be aware of who you purchase from & please gauge/stretch responsibly.