Impact Crate Size Conversion Chart: Old Numbers to Length Labels

Impact changed its crate size labels in 2020 from numbered sizes, such as 300 or 500, to length-based names. The tables below translate those historical labels for Collapsible, High Anxiety, and Stationary crates. They are legacy references, not a list of every size currently for sale.

If you are matching an older crate, start with the model as well as the number. A number by itself does not capture every width, height, or construction detail. And if you are choosing a new crate for your dog, use the current product dimensions instead of assuming the old number tells the whole story.

What do the old Impact crate size numbers mean?

The old numbers were size names, not measurements. The replacement labels describe a length in inches, with notes for certain wider, taller, or heavy-duty versions.

These transcriptions follow Impact’s original 2020 charts. “40 inches” in this historical label does not tell you the complete usable interior dimensions. Keep the model and any height or width note attached to the size when you contact support or compare a listing.

How do old Collapsible crate sizes convert?

The historical Collapsible chart maps numbered sizes from 200 through 750 to length labels from 24 through 54 inches. The old 450 and 500 both use a 40-inch length label, but the 500 is marked wide and tall.

Source: original Collapsible size conversion chart. For a new purchase, check the current Collapsible Dog Crate listing.

How do old High Anxiety crate sizes convert?

The historical High Anxiety chart maps numbered sizes from 300 through 700 to length labels from 30 through 48 inches. Again, the old 500 has the wide-and-tall note.

Source: original High Anxiety size conversion chart. Check the current High Anxiety Crate listing for present-day options.

How do old Stationary crate sizes convert?

The Stationary chart includes special notes for the old 300, 500, and 750. Those notes matter when two versions share a length label.

Source: original Stationary size conversion chart. Use the current Stationary Dog Crate listing when comparing a new unit.

Can you order a replacement pad or part from the old size number?

Use the old number as a starting point, then confirm compatibility with Impact before ordering. A shared length label is not enough to establish that a pad, door, divider, or other part fits your particular crate.

1. Identify the model. Keep Collapsible, High Anxiety, and Stationary details separate.
2. Find any original record. An order number, purchase date, or model label helps identify the unit.
3. Record the actual dimensions. Note whether you measured the interior or exterior, and include width and height as well as length.
4. Photograph the crate and the part. Show the doorway and relevant attachment points when asking about a replacement.
5. Confirm before buying. Send the information to Impact’s crate support team rather than guessing from the nearest name.

Here is the easy mistake to avoid: seeing “500 equals 40 inches” and buying any accessory labeled 40 inches. The chart also says wide and tall. A similar-looking name does not replace a compatibility check.

Are these labels a guide to the right size for your dog?

No. They translate historical product names. Choosing a crate for a dog requires checking usable space and the dog’s measurements, not just the old label or a breed average.

Your dog should be able to stand naturally, turn, and lie comfortably. Keep bedding thickness and doorway clearance in mind, too. UC Davis’s crate guidance explains why comfortable movement and an appropriate size matter.

Keep the model, measurements, and historical label together

The conversion chart answers “What was this size renamed?” It cannot answer every question about a crate built years ago. Use it to narrow your search, keep the special notes, and ask Impact to confirm the details before ordering a replacement or choosing a new crate.