Tiffany Harmony™ Round Brilliant Engagement Ring in Platinum

Style # 64384
1.75 Carat

In the same way that lyrics and music effortlessly blend together, the Tiffany Harmony® engagement ring pairs perfectly with its coordinating wedding band. The delicate four-pronged setting ensures the diamond shines brilliantly above the band and is complemented by the exacting proportions and tapered band of this ring that, when worn with its matching band ring, creates the perfect bridal duet.



At Tiffany, we ethically source our diamonds. Integrity and social responsibility are at the core of our sourcing practices.

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Ring Size Guide

US Size
Inside circumference (mm)
2
41.7
3
42.9
3.5
45.5
4
46.8
4.5
48.0
5
49.3
5.5
50.6
6
51.9
6.5
53.1
7
54.4
7.5
55.7
8
57.0
8.5
58.3
9
59.5
9.5
60.8
10
62.1
10.5
63.4
11
64.6
11.5
65.9
12
67.2
12.5
68.5
13
69.7

Find your fit

Tiffany & Co. uses standard US rings sizes. Refer to our measurement chart or the ruler found in our size guide.

View & download complete guide
Bracelets
Wrist measurements
Extra Small
4.76-5.25 in. 121-133 mm
Small
5.26-5.75 in. 134-146 mm
Medium
5.76-6.25 in. 146-159 mm
Large
6.26-6.75 in. 159-171 mm
Extra Large
6.76-7.25 in. 172-184 mm

Find your fit

Refer to our measurement chart or use the ruler found in our size guide to find the size that suits you.

View & download complete guide
Length (in)
Length (cm)
16
40.50
18
45.75
20
50.75
24
61.00
30
76.25
36
91.50

Find your fit

Necklaces vary by length and can be chosen to reflect personal preference or style.

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We offer complimentary resizing for all Tiffany engagement rings.

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Only Tiffany

More than a century ago, Tiffany & Co. introduced the engagement ring as it is known today worldwide. A Tiffany diamond ring is an iconic symbol of true love and lifetime commitment. In its spectacular brilliance is the promise of the future together.

Responsibly Sourced

As a longtime leader in sustainable luxury, we obtain the majority of our diamonds and precious metals from known mines and sources, because we believe that traceability is the best way to help ensure environmentally and socially responsible practices.

Customize Your Ring

A unique love deserves a unique ring. Our experts can help you, at no additional charge, customize a ring with your choice of diamond, setting and personal inscription.