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Critical Measurements

When selecting new fittings and fixtures for your bathroom or kitchen, knowing exact measurements will ensure you choose the right sizes the first time and save you from making additional trips to our showrooms. If you’re measuring for the first time, here are a few basic measurement tips for key fittings and fixtures:


In general, use your tape measure and get measurements for length, width and depths of the sink cutout itself and the countertop area. For specific sink measurements, follow the guidelines below:

For Bathroom Sinks

  • The size of a drop-in sink is based on the size of the countertop.
  • Typical round vanity sinks are 16″ to 20″ in diameter (oval shapes may be wider).
  • Basin depths are typically 5-8″.
  • Round up to the nearest increment.


  • Measure the depth of the countertop, front to back.
  • Standard vanity countertops are 22″.
  • The standard vanity sink (16″ to 20″) fits into a typical countertop with a 2″ space in front, leaving the space behind the faucet variable.


  • Width of the sink is determined by how much space is available on either side of the sink.
  • E.g., if the countertop is 22″ wide, you only have room for a 16″ sink.
  • If the countertop is over 24″, you can install a sink that is wider (oval).
  • Always leave 4″-6″ or more on either side.


  • Drop in or self-rimmed sinks have a 3/8″ to 1/2″ wide lip around the perimeter.
  • If you are replacing a sink, be mindful of the lip around your new sink’s perimeter.
  • New sinks typically come with a template complete with measurements.

For Kitchen Sinks


  • Place a straight-edge across the top of the old sink.
  • Insert a ruler into the sink, and position its bottom end beside the drain.
  • Measure from the bottom of the sink to the straight-edge to get the depth of the sink.


  • Remove the old sink. Measure the distance from the left side of the opening to the right. This is the total width you have available.
  • If your old sink had a wide lip, the available width may be greater.
  • Measure the distance from the back of the sink opening to its front. This is the total length. It may be greater than the length of your old sink depending on its lip.
  • If you choose a sink with a wide lip, the bowl can be slightly smaller than these maximum dimensions.
  • Round up to the nearest increment.


  • Standard tubs (with apron fronts) are 6″ in length and 30″ to 32″ in width.
  • Depth can range from 14″ to 20″.
  • Measure the width and depth of the alcove your tub sits in as well as your tub.
  • Round up to the nearest increments.


  • Need at least 30″ of clear width, but 32″ to 36″ inches is recommended.
  • The rough-in is the location of the water outlet (typically) beneath the toilet.  The rough-in measurement is the distance from the centre of the outlet to the wall facing the back of the toilet.
  • 12″ rough-in is standard, but alternatives can be 10″ or 14″.
  • General rule of thumb: For clearance from the wall that faces the bowl is 24″ and just about 15″ on each side.  The rough-in measurement lets you know how much clearance you have. Select a compatible toilet.
  • Round up to the nearest increment.


  • Choose your sink first.
  • Spout height: measurement from the counter top to the spout’s opening.
  • Spout reach: measurement (typically) from centre to centre (centre of the faucet base to centre of the water stream).

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