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Cat Door, Safety Pet Door with 4 Way Lock, Weatherproof & Easy Installation Cat Flap Door for Interior Exterior Door, Window, Wall(Medium, 5.98in x 5.7in Flap) Review

By Marcus Bell · Dog nutrition editor · Published 2026-06-12 · Updated 2026-07-03

4.4 (672) Amazon rating$11.99

Our verdict

The Lessmon medium cat door is a budget friendly, weatherproof flap with a 4-way lock, and a 4.4 star average across 672 reviews shows it's a dependable pick for cats and small dogs alike.

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Best for

Households with a cat or small dog needing a basic, affordable flap door for an interior or exterior door, window, or wall, with the option to lock it in multiple positions.

Skip if

You need a door built for a specific thickness range, since this is sized for 2.16 inch openings and may not suit thicker or thinner surfaces.

  • Breed size Extra Small, Medium, Small
  • Priced 62% below the category median ($31.95 across 49 tracked models)

Our scorecard

4.4/5 overall
  • Owner rating4.4/5

    4.4 average across 672 owner ratings

  • Popularity2.5/5

    672 owner reviews, more than most models here

The overall score is owner satisfaction weighted by how many reviews back it, so a high rating from few reviews counts for less. The bars below show where this model stands against the other dog and cat food, health, gear and grooming we track in this category on price, popularity and size. Context, not marks against it, and our read of the data, not a lab test.

Overview

["This Lessmon cat door is a plastic flap style pet door sized for the medium option at 5.98 by 5.7 inches, with an overall unit size of about 7.48 by 7.87 by 2.16 inches. It's built to install in interior or exterior doors, windows, or walls, and is rated for cats as well as small to medium dogs.", "The 4-way lock feature lets owners set the flap to locked, one way in, one way out, or fully open, which adds some control over when pets can pass through. At $11.99, it's one of the more affordable options in this category, and Lessmon markets it as weatherproof and easy to install.", 'With 672 reviews and a 4.4 star average, this door has built up a solid reputation, though it shows 0 units bought in the past month at the time of this review, suggesting demand may fluctuate.']

Pros

  • Strong 4.4 star average across 672 reviews
  • 4-way lock gives control over pet access
  • Affordable price point at $11.99
  • Works for cats and small to medium dogs, plus multiple surface types

Cons

  • Recent purchase volume shown as 0 in the past month
  • Plastic frame and flap may be less durable than heavier duty options
  • Fixed 2.16 inch thickness range limits which doors or walls it fits

Specifications

Breed size
Extra Small, Medium, Small

Performance notes

Built for a 2.16 inch maximum and minimum compatible thickness, this door uses a combined flap and lock closure system, with a plastic frame and flap construction sized for the medium 5.98 by 5.7 inch flap opening.

What buyers say

A 4.4 star rating from 672 reviews points to consistent satisfaction with this budget option, even though bought_last_month data shows no recent purchase activity recorded.

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Frequently asked questions

Can this be used for both cats and dogs?

Yes, it's rated for cats as well as small and medium sized dogs, with the medium flap size at 5.98 by 5.7 inches.

What does the 4-way lock do?

The 4-way lock lets you set the flap to fully locked, in only, out only, or free swinging in both directions, giving flexible control over pet access.

What surfaces can this be installed in?

It's designed for interior and exterior doors, windows, and walls, as long as the surface thickness is around 2.16 inches.

our full rankings  ·  All Cat Doors

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