Memory Card Form Factor
 

Memory cards are offering a small form factor and are designed to be easily transported. Both in size and weight memory cards are superior to storage media like hard disk drives. Memory cards can be found in sizes from approximate the size of a matchbox to the size of a thumbnail. They weight ranges from 15 grams to as low as 0.4 gram.

Memory cards can be split up in three categories based on their form factor. In the first category memory cards can be found having approximately the size of a matchbox or small pack of gum. In the next category the size is about the size of a postage stamp or smaller. In last category, which was specifically developed to be used by mobile phones, they have the size of a thumbnail or smaller.

Memory Stick, MultiMediaCard and Secure Digital families are all having three memory card form sizes in their portfolio. Since these standards are competing with each other, all three memory card standards are more or less having similar form factors. The general trend in form factor is that cards are getting smaller, which is obvious, and the latest news was the announcement of the Memory Stick Micro development. A comparable table over the memory cards form factor is presented below.

Memory Card
H x W x D
Volume
Weight
Comparable
Standard
in mm
in mm
in gram
in size with a
CompactFlash Type I
42.8 x 36.4 x 3.3
5141
12 Matchbox
CompactFlash Type II
42.8 x 36.4 x 5
7790
15 Matchbox
         
SD Memory Card
32 x 24 x 2.1
1613
2 Postage stamp
miniSD
21.5 x 20 x 1.4
602
1 Half postage stamp
microSD
11 x 15 x 1
165
0.4 Thumbnail
TransFlash
11 x 15 x 1
165
0.4 Thumbnail
 
   
MultiMediaCard (MMC)
32 x 24 x 1.4
1075
1.5 Postage stamp
MMCplus
32 x 24 x 1.4
1075
1.5 Postage stamp
RS-MMC
18 x 24 x 1.4
605
1 Half Postage stamp
DV RS-MMC
18 x 24 x 1.4
605
1 Half Postage stamp
MMCmobile
18 x 24 x 1.4
605
1 Thumbnail
MMCmicro
12 x 14 x 1.1
185
0.4 Thumbnail
   
Memory Stick
50 x 21.5 x 2.8
3010
4 Small pack of gum
Memory Stick PRO
50 x 21.5 x 2.8
3010
4 Small pack of gum
Memory Stick Duo
31 x 20 x 1.6
992
2 Postage stamp
Memory Stick PRO Duo
31 x 20 x 1.6
992
2 Postage stamp
Memory Stick Micro
15 x 12.5 x 1.2
225
- Thumbnail
 
   
SmartMedia Card
45 x 37 x 0.76
1265
1.8 Matchbox
xD-Picture Card
25 x 20 x 1.7
850
2 Postage stamp
   
PC Card Type I
85.6 x 54.0 x 3.3
15254
- Credit card
PC Card Type II
85.6 x 54.0 x 5.0
23355
- Credit card
PC Card Type III
85.6 x 54.0 x 10.5
48535
- Credit card
 
   
USB Flash Drive
No standard dimensions
Small lighter
   

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