Lady’s Platinum and Diamond 1.18ct ring size 5

Bought this at Costco and paid $ 4300 with tax for it . I wore couple time and now getting too tight on my finger since gain weight. Here is the description from Costco Costco makes purchasing quality jewellery easy by offering only the industry's highest quality diamonds at the lowest possible price. Costco's experienced buying team works with our suppliers to select timeless styles and create well-crafted and comfortable jewellery. Our team of Graduate Gemologists inspects each piece for quality craftsmanship and every diamond for cut, colour, and clarity to ensure your jewellery will sparkle for generations. Metal: 950 platinum Diamond shape: princess cut and round brilliant Total diamond weight: 1.17 ctw Centre diamond weight: 0.70 ct Total number of diamonds: 119 Diamond clarity: very slightly included (VS2) Diamond colour: near colourless (I) Ring size: 5 - sizable within 2 sizes (Costco does not provide this service)