"The size of the ring will change depending on the design and shape of the wearers' finger."
- "The size of the ring will change depending on the design of the ring and the shape of the wearer's finger."
"the size of the ring" 「指輪のサイズ」
"shape of the wearers' finger" 「指の形」"wearer" は指輪をつけている人のことを表します。
"depending on ~" 「〜によって」
"will change" 「違います」