A sink bottom grid is a simple but essential accessory that protects your sink from scratches, improves drainage, and extends its lifespan. However, choosing the wrong size is one of the most common mistakes buyers make.

This sink bottom grid size guide will show you how to measure your sink correctly, explain key dimensions to watch for, and help you select the right grid for a perfect fit.

What Is a Sink Bottom Grid?

A sink bottom grid (also called a sink rack or sink grate) is placed at the bottom of the sink to:

• Protect the sink surface from scratches and dents

• Allow water to drain freely

• Prevent dishes from sitting directly in standing water

• Reduce noise from pots and utensils

Sink grids are commonly made from stainless steel and are widely used in residential kitchens, commercial sinks and bar sinks.

Why Sink Bottom Grid Size Matters

A properly sized sink grid should sit flat on the sink bottom without blocking the drain or touching the sink walls.

Choosing the wrong size can lead to:

• Poor drainage

• Grid movement or tipping

• Scratches on sink walls

• Incompatibility with the drain position

That's why accurate measurement is critical before ordering a sink bottom grid.

How to Measure Your Sink for a Bottom Grid

Step 1: Measure the Inside Length and Width

Use a tape measure to measure the inside bottom dimensions of your sink.

• Measure from left to right for inside width

• Measure from front to back for inside length

Important:

Always measure the inner bottom, not the outer sink dimensions.

Step 2: Subtract Clearance Space

Sink grids should be slightly smaller than the sink bottom to allow easy placement and removal.

Recommended clearance:

• Subtract 10–15 mm (⅜–½ inch) from both length and width

This ensures the grid fits comfortably without pressing against the sink walls.

Step 3: Measure the Drain Position

Drain placement is a key factor when choosing a sink bottom grid.

Common drain positions:

• Center drain

• Rear drain

• Offset drain

Measure:

• Distance from the drain center to the back wall

• Distance from the drain center to the side wall

This helps ensure the drain hole on the grid aligns perfectly with your sink.

Step 4: Check Sink Corner Radius

Sink corners are not always sharp 90° angles.

Look at:

• Square corners

• Rounded corners

• Tight-radius corners

Choose a grid with matching corner design to avoid gaps or improper fit.

Standard Sink Bottom Grid Sizes (Reference)

While sinks vary widely, common sink grid sizes include:

• 26" × 14"

• 27" × 15"

• 28" × 16"

• 29" × 17"

These sizes are reference only—always measure your sink before purchasing.

Single Bowl  vs  Double Bowl Sink Grids

Single Bowl Sinks

• One grid sized to fit the full sink bottom

• Drain position must match exactly

Double Bowl Sinks

• Two separate grids (one for each bowl)

• Each bowl must be measured individually

Never assume both bowls are the same size.

Common Measuring Mistakes to Avoid

• Measuring the top opening instead of the bottom

• Forgetting to subtract clearance space

• Ignoring drain position

• Assuming a "standard size" will fit all sinks

Avoiding these mistakes saves time, cost, and returns.

Custom Sink Bottom Grids: When Standard Sizes Don't Fit

If your sink has:

• Non-standard dimensions

• Unique drain placement

• Special corner radius

A custom sink bottom grid may be the best solution.

Custom options can include:

• Exact size matching

• Custom drain hole position

• Logo engraving

• Specific wire thickness or finish

Custom grids are popular for OEM brands, commercial kitchens, and high-end residential projects.

Final Tips Before Ordering a Sink Grid

Before placing your order, double-check:

• Inside bottom length & width

• Clearance allowance

• Drain position and diameter

• Corner shape

When in doubt, providing a sink drawing or photo with measurements helps ensure accuracy.

Final Thoughts

Measuring your sink correctly is the key to choosing the right sink bottom grid. With proper measurements and attention to detail, you can ensure a perfect fit that protects your sink, improves drainage, and enhances daily kitchen use.

Whether you choose a standard size or a custom solution, a well-fitted sink grid is a small upgrade that makes a big difference.