Size 16

B03 White

Size Guide
Choosing the Right Plastic Snap Size

Snaps are not one-size-fits-all.  If your snaps are too long for your fabric, they won't close properly.  If they're too short, they'll fall off. For this reason, it's important to choose the proper size / length for your material.

Which size works best for you will depend on a number of variables, such as the fabric you are using, its density and compression levels, how hard you are able to press, and your own personal preference.  For these reasons, we are unable to provide specific size recommendations for every scenario. 

------>>>>>> Download a printable pdf file showing each snap in its true-to-life size.

Plastic KAM Snaps Fasteners Size Comparison Chart - What Size Snaps Do I Have?


Dimensions of Size 20 Snap Parts


The 3 most commonly used sizes, in the order of popularity, are:

    1. Size 20 regular length
    2. Size 20 extra long (for thicker material)
    3. Size 16 regular length (for thinner material)

Size 20 (12.4mm or 1/2" cap diameter)

  • Size 20 Regular Length (5.6mm prong) is often used for lightweight to mid-weight fabric that isn't prone to tearing including baby diapers, menstrual pads, bibs, regular clothing, and household projects.   This is the most popular size of plastic snaps and is a good size to start with for most projects since most commonly used fabric fall within the desired thickness for this length. This size has a strong grip so if you're working with more delicate fabric at risk of tearing, consider size 16.

    ------>>>>>> Click here for sizing tips for baby & toddler clothing.
  • Size 20 Extra Long (6.2mm prong) is recommended for slightly thicker & denser material like double layers of standard marine vinyl for key fobs, medium weight leather, and chinese prefold diapers. (Some versions of these material may be so thick that they'll need larger/longer snaps.)

Size 16 (10.7mm or 7/16" cap diameter)

  • Size 16 Regular Length (4.6mm prong) is most commonly used for  projects that require a looser grip, such as doll clothes or reinforced stretch jersey.
  • Size 16 Extra Long is available in lengths ranging from 5.2mm - 7.2mm long for thicker material.

Size 22 (14.1mm or 9/16" cap diameter, 7.0mm prong)

  • A larger snap which can be used in similar situations as size 20 long-prong, or in situations where size 20 long-prong is still a little too short.

Size 24 (14.8mm or 9/16" cap diameter, 7.5mm prong)

  • Our largest, strongest snap which should only be used in very heavy duty applications with thicker material such as canvas tote bags, nylon webbing, dense leather and thick jackets. Because the grip is so strong, it can tear through more commonly used fabric.

Buy 2 get 3rd free:Add 3 packs of GLOSSY 1000 sets to your cart. The 3rd pack will be free at checkout. Not applicable to 50 sets or matte.

  • Count: 50 or 1000 Sets
  • Size: 16 (11mm - 7/16")
  • Stem Length: Regular (4.6mm)
  • Finish: Glossy or Matte
  • CPSIA Compliant: Phthalate, Lead
  • Set: 2 caps + socket + stud

Tip: add the color sampler charts for easy color matching





Customer Reviews

Based on 16 reviews
Sharon Brausch

I LOVE my KAM snaps!! They are extremely easy to install. I will be placing another order tomorrow for sure.

Alisa k.

These are my favorite of all the snaps. They are nice and petite for baby clothing (crotch snaps especially) but are still strong enough to hold on. The quality is great and I got them very quickly. They have held up extremely well in the wash. None have broken on anything I have made.


The size 16s are perfect for unpaper towels! I cab really grab a towel and the snaps easily come apart versus having to port then apart like I do with the 20s. But at the same time, hold together perfectly!


Size 16 snaps in glossy are my favourite! Mine are used for cloth pads- the profile is more discreet than the more common size 20 and they are super easy to unsnap while being secure enough to stay in place. Unlike the size 20 snaps, the socket and stud don't fit perfectly in each other (think of the middle of an ice cream sandwich). This minor cosmetic issue does not affect usability and it is the only aspect getting in the way of making this absolutely perfect. Reply from KAMsnaps: Thanks for your review, Sylvie! As with all our snaps, the #16 parts do fit perfectly with each other. They wouldn't work properly otherwise.

Sarah Cone

I love the plastic snaps! Super easy to use with the handheld pliers and they look so professional on everything I make! They snap closed tightly but easy enough to take apart. I am very happy with the quality.

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