Cardboard Corners

Twikart offers many different varieties and sizes of carboard corners. Most corners have a flap which allows the corner to lock in place to ensure the protection of your items.  Our corners fold and have a locking tab which goes over the front lip so you don't need to staple or tape them on the frames in most cases. These are quality American-made products manufactured exclusively for us. Ours are the industry standard in cardboard corners.

 Made in America


  • Our corners are scored not perforated - this means that all the folds are smooth and clean 
    without the "dotted line" perforations.
  • Most of our cardboard corners are adjustable - this means they can be folded in two or 
    three different widths so they're much more versatile than single-fold corners which will 
    cost you the same or more from other vendors.
  • We offer quantity discounts for multi-box orders and you can mix and match corners on 
    larger orders for the best combined pricing. We will automatically give you the multi-box 
    price on larger orders, or you can call for a specific quote before ordering.

CP-0 Cardboard Corner

The CP-0 is about 2" x 2" and fits frames 1/2" to 3/4" deep. The CP-0 is our smallest corner. This corner protector folds one way and has a locking flap which folds under and locks the corner on the front of most frames.

CP-1 Cardboard Corner

The CP-1 is 4" x 4" when folded and fits frames that are 1/2" to 2" deep. This corner can be folded three different ways and also has a locking flap which folds under and locks the corner on most frames. Available in bright white or matte black finish.

CP-1B Cardboard Corner

The CP1-B is about 4" x 4" and will fit frames from 1/2” to 2” deep. This corner comes in matte black finish. The CP1-B cardboard corners can be folded three different ways to fit a wide range of frames.

CP-2 Cardboard Corner

The CP-2 is 3-1/2" x 3-1/2" and fits frames from 1/2" to 1-3/8" deep. The CP-2 Cardboard Edge Guards is very similar to the CP-1, but only folds two different ways. This corner protector has a locking flap that folds under and locks the corner on most frames. 

CP-3 Cardboard Corner

The CP-3 is 4-1/2" x 4-1/2" and can be folded anywhere from 3/4" to 2". The CP-3 Corrugated corner protector is perfect for wooden frames, plaques, and stretched canvases. This carboard corner will wrap around the edges of your frames and can be stapled, glued, or taped on the back.

CP-4 Cardboard Corner

The CP-4 is 3" x 3" and folds two ways for 3/4" and 1-1/2" canvas wraps. This corner protector has a folding tab to hold itself together, but you can also staple, glue or tape it to the back of the artwork. There is no internal lock tab, so there will be no damage to the delicate surfaces of your artwork.

CP-5 Cardboard Corner

The CP-5 is about 6-1/2" x 6-1/2" and fits frames from about 1.5" to 3" deep. This corner protector would be great for wide and deep mouldings. The CP-5 comes in bright white finish with a locking flap.

CP-10 Cardboard Corner

The CP-10 is about 5" x 5" and fits bigger frames about 3/4" to 2" deep. The CP-10 is a mid-size carboard corner protector (larger than the CP-1, but smaller than the CP-5). The CP-10 has three folds (3/4", 1-1/4" & 2"). This corner protector comes in a bright white finish.