この指輪は

this ring...

→ 此の
phrase Rare #36,081
this ring... この指輪 means “this ring,” and は marks it as the topic. The phrase normally needs a following description or question, such as its price, size, or purpose.
JA: この指輪は母からのプレゼントです。
EN: This ring is a present from my mother.

この指輪は就職

This ring is for getting a job.

— きっと、うまくいく (2009)

この指輪は姉さん結婚

This ring is for my older sister's wedding.

— きっと、うまくいく (2009)

この指輪は大きすぎて私のに合わない

This ring is too big for my finger.

この指輪は試験

This ring is a test.

— きっと、うまくいく (2009)