What is the hole size for sinks? What are the standard hole sizes for sinks?

Mar 13, 2026 PipesB2B Marketplace
One, what is the hole size for the sink?- Standard hole size for sinks: The size of holes in sinks should be smaller than the size of the sink itself. Generally, the size is determined by the sink's capacity. A common rule is to subtract 3 centimeter

One, what is the hole size for the sink?

- Standard hole size for sinks: The size of holes in sinks should be smaller than the size of the sink itself. Generally, the size is determined by the sink's capacity. A common rule is to subtract 3 centimeters from both the length and width of the sink to determine the hole size. For example, if you purchase a 700mm x 400mm sink, you would drill holes that are 670mm x 370mm. If the sink has wider edges, you can further reduce the length and width by 1-2 centimeters. The specific hole size should be based on the size of the sink you purchase.

If you are concerned about the size, you can adjust it accordingly. However, it is recommended to have the installer measure and create the holes themselves. Experienced installers generally avoid creating excessively large or unsuitable holes.

Two. Standard opening size for sinks

1、Currently, some homeowners opt for prefabricated sinks, while others choose sinks that are custom-made. However, sinks that are custom-made require a corresponding cut-out size based on the sink's specific dimensions.

2. For most typical households, two common sink sizes are often chosen: 880mm x 480mm and 810mm x 470mm. However, these sizes correspond to corresponding hole sizes of 850mm x 450mm and 780mm x 440mm, respectively.

3. Of course, it is also possible to customize sinks, so the opening size can be determined based on the dimensions of the customized sink.

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