Follow the below mentioned steps:

Method A:

1. Select a ring that properly fits the intended finger. The "ring finger" is located between the little finger and middle finger. Engagement and wedding rings are traditionally worn on the ring finger on the left hand in the United States.
2. Place the ring over the circles below, matching the inside edge of the ring to the circle nearest in size. This measurement refers to the diameter of the ring. 
3. If the ring falls between two sizes, order the larger size.

Method B - Measure Finger With Paper Sizer

1. Carefully cut along the outline of the sizer. Make a small slit in the left end of the sizer.
2. Wrap the sizer around the intended finger with the numbers facing out. 
3. Slide the pointed end of the sizer through the slit.
4. Move the sizer to the largest part of the finger, this may be the knuckle.
5. Pull tightly. The sizer must fit snugly to produce an accurate size. 
6. The number that lines up at the slit represents the ring size for that finger.

• Make your jewelry the last thing you put on in the morning, and the first thing you take off at night.
• Remove when cleaning, swimming and taking a shower. The chemicals used during these activities could cause immediate tarnishing.
• Remove when sleeping. Movement during sleep can cause stress.
• Store your jewelry in a cool, dry place. The bag provided will slow tarnishing and prevent scratching by other pieces in your jewelry box. 
• Wipe your jewelry clean with a soft cloth before returning it to storage to remove any body oils and dirt.
• With normal daily wear, even when adhering to the above recommendations, the wire will eventually need replacing. You may want to have your jewelry periodically restrung to prevent breakage or loss.

Cleaning:

• To keep your jewelry looking its best, periodically clean it in a mild soapy water mixture and a SOFT toothbrush. Rinse thoroughly with water and dry completely with a soft cloth.  Never use paper towels or tissues to dry your jewelry as they contain fibers that can scratch.
• I used to say you should never use a silver polishing (or treated) cloth on Swarovski crystals, as the chemicals on the cloth could scratch the surface and dull the shine. However, I have since discovered a polishing cloth (called the Sunshine Polishing Cloth) which does not scratch crystals and is perfect to care for your new jewelry.  The only caveat is that the Sunshine Polishing Cloth will remove the oxidation from Bali beads, so if you are not careful, you could change the appearance of your jewelry by using this cloth enthusiastically.
• Never let your jewelry soak in water, as it could corrode the wire the jewelry is strung on.  If it does get wet, make sure you dry it completely.
• Never use any type of jewelry cleaners or dips. The letter beads and Bali beads have an "antiqued" appearance. They have been oxidized to enhance their detailed appearance. These solutions could remove the oxidation (or "antiquing").   

Proper sterling silver jewelry care ensures you will enjoy your jewelry for years to come.