Free tools Windows power users keep installed
One-click scans. No signup required.
A full-size SD card is the standard physical form of an SD memory card—not a description of its storage capacity. The SD Association lists its dimensions as 32 × 24 × 2.1 mm (length × width × thickness). It is larger than a microSD card and fits devices designed for a standard SD slot.
What does “full-size SD card” mean?
“Full-size” refers to the card’s physical shape. It distinguishes the standard SD card from the smaller microSD form factor. The SD Association also recognizes miniSD, but says microSD has replaced it in common use. SD Association: SD standard overview
As an Amazon Associate I earn from qualifying purchases.
A microSD card does not become a full-size SD card when it is placed in a passive SD adapter. The memory card remains microSD; the adapter simply lets it fit a standard SD slot.
What size is a full-size SD card?
The SD Association specifies the standard SD card as 32 × 24 × 2.1 mm: 32 mm long, 24 mm wide, and 2.1 mm thick. SD Association: SD, SDHC, SDXC and SDUC capacity overview
#1 Best Overall
- Fast for better pictures and Full HD video. Full HD (1920x1080) video support may vary based upon host device, file attributes, and other factors
- Great choice for compact to mid-range point-and-shoot cameras
- From 32GB to 256GB(1) to store tons of pictures and even more Full HD video(2). (1)1GB=1,000,000,000 bytes Actual user storage less
- Exceptional video recording performance with UHS Speed Class 1 (U1)(5) and Class 10 rating for Full HD video (1080p)(2). (5)UHS Speed Class 1 (U1) designates a performance option to support real time video recording with UHS enabled host devices
- Quick transfer speeds up to 100MB/s. Up to 100MB/s[64GB-256GB; 90MB/s for 32GB] read speed; write speed lower Based on internal testing; performance may be lower depending on host device, usage conditions, and other factors 1MB=1,000,000 bytes
How is physical size different from capacity?
The physical form and the capacity family are separate classifications. A standard-size card can belong to different capacity families; “full-size” does not mean high-capacity. The SD Association gives these ranges:
| Capacity family | Stated capacity range |
|---|---|
| SD | Up to 2 GB |
| SDHC | More than 2 GB through 32 GB |
| SDXC | More than 32 GB through 2 TB |
| SDUC | More than 2 TB through 128 TB |
These are the Association’s standard ranges, not a guarantee that every capacity within a range is available for purchase or supported by a particular device. SD Association capacity overview
Rank #2
- Brand: Sandisk
What else differs between SD and microSD cards?
Besides physical dimensions, the SD Association notes differences in pin count and in whether a write-protect switch is present. Standard SD cards have a write-protect switch. High Speed and UHS-I full-size cards use nine pins, while newer interfaces can use additional contact layouts. Check the card and device specifications when interface or speed support matters. SD Association: SD standard overview
The Tool Desk
Outbyte Driver Updater FREEScan for outdated or missing drivers - takes under a minuteDriver Scan →Outbyte PC Repair FREEClear out junk files and repair common Windows errorsFree Scan →How do you check whether a full-size SD card will work?
Match the card to the exact device, rather than relying on its physical fit alone. Before buying, check the device manual or manufacturer specifications for:
Rank #3
- Full-size SD card, 32GB SDHC flash memory card 2 pack. Not compatible with mobile phones due to physical dimensions
- SDHC card Read speed: 60MB/s, Write speed: 10MB/s, allowing quick picture shooting and file transfer
- Class 10 speed rating ensures even and sustained video recording performance for full HD videos
- SDHC supporting devices ONLY. Not backwards compatible, legacy devices may not be supported. Consult your device specifications for compatibility
- 3-Year Limited Warranty. Rugged construction to resist damage. SDHC memory cards can ONLY be used with SDHC / SDXC host devices, will NOT work with SD host devices. Look for the SDHC / SDXC logo on host devices to ensure compatibility
- Slot shape: whether the device has a standard SD slot or a microSD slot.
- Capacity family: which of SD, SDHC, SDXC, or SDUC it supports, and its capacity limit.
- Speed and interface: any documented bus or speed requirements for the device.
SD standards cover many kinds of devices, but that does not mean every card works in every host. A computer without a compatible built-in slot may need a USB SD card reader; that accessory is not needed when the device already has the appropriate slot. SD Association: SD standard overview
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.How long does a full-size SD card last?
The SD Association says service life depends on how a card is manufactured and that current technology with normal usage typically gives a lifespan of 10 years or more. This is a qualified general statement, not a warranty or a guarantee that a card is safe for long-term archiving. SD Association FAQ
Quick Recap
Best Value
- CAPTURE LARGER THAN LIFE. Unlock 4K UHD(3) brilliance and pristine high res stills with video speed class ratings of U3 and V30(4).
- SPEED BARRIERS SHATTERED. Save precious moments with blazing read speeds up to 250MB/s(2) and write speeds up to 170MB/s(2) [256GB-1TB capacities(1)].
- MAXIMIZE WITH MASSIVE CAPACITY. Capture for longer and store more with up to 2TB(1) of storage that can hold up to 2,808 minutes of 4K UHD video recorded at 30 fps (641MB/minute)(9).
- DEFY THE ELEMENTS. Unrelentingly resilient, Sandisk SD memory cards are engineered to perform in extreme conditions, despite rough handling and constant use.(6)
- CONTENT MANAGEMENT, SIMPLIFIED. Back up, organize, and transfer everything easily with the Sandisk Memory Zone desktop app,(7) whether you use an SD card slot or a card reader.
Rank #4
- Full-size SD card, 32GB SDHC flash memory card 10 pack. Not compatible with mobile phones due to physical dimensions
- SDHC card Read speed: 60MB/s, Write speed: 10MB/s, allowing quick picture shooting and file transfer
- Class 10 speed rating ensures even and sustained video recording performance for full HD videos. Great compatibility with a trail camera, hunting camera, as well as other photo and video camera devices
- SDHC supporting devices ONLY. Not backwards compatible, legacy devices may not be supported. Consult your device specifications for compatibility
- 3-Year Limited Warranty. Rugged construction to resist damage. SDHC memory cards can ONLY be used with SDHC / SDXC host devices, will NOT work with SD host devices. Look for the SDHC / SDXC logo on host devices to ensure compatibility
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.
