14K TT Oval Shape Semi-Mount Halo Diamond Engagement Ring, 16 Baguette/Marquise/Round Diamonds = ~0.63ctw, F - G | VS2 - SI1 (Size 6.5) (No Center Stone)
Take a piece of non-stretchable string, ribbon, thread, or a thin strip of paper. Wrap it comfortably around your ring finger, close to the knuckle.