How do I know if the strainer can fit my drain?

Sometimes, the product descriptions on the package or website are so confusing. It is saying that most sinks have a 3.5 inch – 4 inch diameter drain opening. But why the description of some strainers is 4.5 inch?

Regency 3 1/2 Flat Strainer for Twist / Lever Handle Valve Drains

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Bathroom Sink Drain Strainer Stainless Steel, 2 Pack Floor Drain Filter Mesh Basket Filter Hair Trap Anti-Clog Slag Strainer - Large Wide Rim 2.16 Diameter

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Buy Fackelmann Stainless Steel Sink Strainer, 6.3 Cm - Long Lasting Construction Online at Best Price of Rs 85.5 - bigbasket

How do I know if the strainer can fit my drain?

LKQS35CA

The Plumber's Choice 3-1/2 in. - 4 in. Kitchen Sink Spin and Seal Stainless Steel Drain Assembly with Strainer Basket - Threaded Stopper ESS1457 - The Home Depot

Water Draining Away From My Sink…

Porte canne SUNSET piquet pour Canne 1.00m/ 1.20m /1.50m – Pêcheur, support de canne à pêche

115mm Stainless Steel Strainer Basket for Kitchen Sink Drain