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SIM Card Sizes

SIM card compatibility chart

SIM sizes

The SIM card, which comes in various sizes, is a tool that has grown to become a part of everyday life.

However, the SIM card comes in one of three sizes, which can be confusing. After all, what SIM card fits your phone? How large is your SIM card slot?

In this guide, you'll find not only a brief definition of the SIM card but also the details on the available SIM card sizes, a chart on handset SIM card slot sizes, and more information on the growth of SIM cards.

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What is a SIM Card?

What is a SIM card, you might first ask? Well, a SIM, or subscriber identification module, card - embedded within the SIM card tray typically located near to the phone battery in a GSM phone - contains your unique profile and other additional information, such as your phone contacts.

With the SIM card, you'll be able to use your phone with the necessary tower. To put it simply, the SIM card tells the tower and your carrier network that you are authorized to use the cell phone tower.

Apple iPhone SIM Card Sizes

Apple iPhone SENano SIM
iPhone 6Nano SIM
iPhone 6 PlusNano SIM
iPhone 6SNano SIM
iPhone 6S PlusNano SIM
iPhone 7Nano SIM
iPhone 7 PlusNano SIM
iPhone 8Nano SIM
iPhone 8 PlusNano SIM
iPhone XNano SIM
iPhone XRNano SIM
iPhone XSNano SIM
iPhone XS MaxNano SIM
iPhone 11Nano SIM
iPhone 11 ProNano SIM
Apple iPhone 11 Pro MaxNano SIM

Samsung Galaxy SIM Card Sizes

Galaxy S7Nano SIM
Galaxy S7 EdgeNano SIM
Galaxy S8Nano SIM
Galaxy S8 PlusNano SIM
Galaxy S9Nano SIM
Galaxy S9 PlusNano SIM
Galaxy S10eNano SIM
Galaxy S10Nano SIM
Galaxy S10 PlusNano SIM
Galaxy Note 8Nano SIM
Galaxy Note 9Nano SIM
Galaxy Note 10Nano SIM
Galaxy Note 10 PlusNano SIM

Google Pixel SIM Card Sizes

Pixel 2Nano SIM
Pixel 2 XLNano SIM
Pixel 3Nano SIM
Pixel 3 XLNano SIM
Pixel 3aNano SIM
Pixel 3a XLNano SIM

Micro SIM vs Nano SIM

Alright, now for the meat of the guide. What are the various SIM card sizes? What are the differences between the sizes?

Some phones are compatible with one size, while others only take a different size. Fortunately for many, quite a few carriers will distribute universal SIM card kits, meaning that you can pop out a SIM card of any size from the kit that will fit your phone.

Some carriers may offer what is known as a dual cut SIM, or dual SIM. A dual SIM is when two SIM cards - like the Micro SIM card and the standard SIM - are sold together in one card. So if your mobile device needs a Micro SIM card, then you'll be able to pop the smaller Micro SIM card out of the larger Standard SIM card and insert the card into the SIM card tray.

Micro SIM Card

The Micro SIM card is known as 3FF or third form factor. It is the "third-generation" of SIM card types, measuring at 15mm x 12mm x 0.76mm. Micro SIM cards were introduced with the following purpose: fitting into devices that are too small for the previous generation of SIM cards.

Better yet, the Micro SIM is backward-compatible, featuring the same assets and design as the Standard SIM. Again, the only difference is the amount of plastic surrounding the chip.

Nano SIM Card

Finally, we have the most current and smallest SIM card type available on the market: the Nano SIM card. The Nano SIM card is today's standard, acting as the SIM card for many flagship models.

The Nano SIM acts as the "fourth generation" (4FF) of SIM cards, measuring at 12.3mm x 8.8mm x 0.67mm. Furthermore, this smart card was released during early 2012.

Standard SIM Card

The Standard phone SIM card, otherwise known as the Mini SIM card, belongs to the "second generation" of SIM cards - this is why it is also referred to as 2FF, or second form factor. The reason why it is referred to as the standard size is due to the fact that the full-sized first-generation SIM card, which was introduced in 1996, has died out.

The measurements of the Standard phone SIM card are 25mm x 15mm x 0.76mm.

Most new smartphones today do not require the standard SIM card.


Overall, SIM cards come in three different sizes though they aren't all that different from each other. The only differences lie in the amount of plastic surrounding the chip.

However, be sure to refer to our table above to find what SIM card you'll need for your phone. Of course, if you desire to keep your SIM card for the long haul, you'll probably want to look into a SIM card adapter or a cutter.

Need a helping hand to find a SIM card plan perfect for you? Use our prepaid SIM comparison guide!

Rob Webber
Rob Webber

Rob has 15+ years experience in the US and UK running price comparison sites for cell phone plans, smartphone deals, TV, and internet. He loves thinking outside of the box to build tools that empower consumers to make more informed decisions.

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