{"id":273,"date":"2009-01-24T21:40:44","date_gmt":"2009-01-24T21:40:44","guid":{"rendered":"https:\/\/www.garfnet.org.uk\/cms\/form-factors-for-storage-media\/"},"modified":"2026-09-05T01:23:57","modified_gmt":"2026-09-05T01:23:57","slug":"form-factors-for-storage-media","status":"publish","type":"page","link":"https:\/\/garfnet.org.uk\/cms\/tables\/general\/form-factors-for-storage-media\/","title":{"rendered":"Form factors for storage media"},"content":{"rendered":"

The following table lists various hard disk and SSD form-factors and gives their actual size in millimetres.<\/b><\/p>\n

Form Factor<\/span><\/a><\/div><\/th>
Profile Name<\/span><\/a><\/div><\/th>
Year of Release<\/span><\/a><\/div><\/th>
Platter Size (mm)<\/span><\/a><\/div><\/th>
Width (mm)<\/span><\/a><\/div><\/th>
Depth (mm)<\/span><\/a><\/div><\/th>
Height (mm)<\/span><\/a><\/div><\/th>
Comment<\/span><\/a><\/div><\/th><\/tr><\/thead>
5.25\u2033<\/div><\/td>
Full-Height<\/div><\/td>
1980<\/div><\/td>
130.05<\/div><\/td>
146.05<\/div><\/td>
203.2<\/div><\/td>
82.55<\/div><\/td>
All drives in early 1980s; Large capacity drives with many platters as late as the mid-1990s<\/div><\/td><\/tr>
5.25\u2033<\/div><\/td>
Half-Height<\/div><\/td>
1980<\/div><\/td>
130.05<\/div><\/td>
146.05<\/div><\/td>
203.2<\/div><\/td>
41.4<\/div><\/td>
Early 1980s through early 1990s<\/div><\/td><\/tr>
5.25\u2033<\/div><\/td>
Low-Profile<\/div><\/td>
1980<\/div><\/td>
130.05<\/div><\/td>
146.05<\/div><\/td>
203.2<\/div><\/td>
25.4<\/div><\/td>
Quantum Bigfoot, mid-to-late 1990s<\/div><\/td><\/tr>
5.25\u2033<\/div><\/td>
Ultra-Low-Profile<\/div><\/td>
1980<\/div><\/td>
130.05<\/div><\/td>
146.05<\/div><\/td>
203.2<\/div><\/td>
19.05<\/div><\/td>
Quantum Bigfoot, mid-to-late 1990s<\/div><\/td><\/tr>
5.25\u2033<\/div><\/td>
Ultra-Low-Profile<\/div><\/td>
1980<\/div><\/td>
130.05<\/div><\/td>
146.05<\/div><\/td>
203.2<\/div><\/td>
20.32<\/div><\/td>
Quantum Bigfoot, mid-to-late 1990s<\/div><\/td><\/tr>
3.5\u2033<\/div><\/td>
Half-Height<\/div><\/td>
1983<\/div><\/td>
63.5<\/div><\/td>
101.6<\/div><\/td>
146.05<\/div><\/td>
41.4<\/div><\/td>
High-end, high-capacity drives<\/div><\/td><\/tr>
3.5\u2033<\/div><\/td>
Half-Height<\/div><\/td>
1983<\/div><\/td>
76.2<\/div><\/td>
101.6<\/div><\/td>
146.05<\/div><\/td>
41.4<\/div><\/td>
High-end, high-capacity drives<\/div><\/td><\/tr>
3.5\u2033<\/div><\/td>
Half-Height<\/div><\/td>
1983<\/div><\/td>
95<\/div><\/td>
101.6<\/div><\/td>
146.05<\/div><\/td>
41.4<\/div><\/td>
High-end, high-capacity drives<\/div><\/td><\/tr>
3.5\u2033<\/div><\/td>
Low-Profile<\/div><\/td>
1983<\/div><\/td>
63.5<\/div><\/td>
101.6<\/div><\/td>
146.05<\/div><\/td>
25.4<\/div><\/td>
Industry standard, most common form factor for PC hard disks<\/div><\/td><\/tr>
3.5\u2033<\/div><\/td>
Low-Profile<\/div><\/td>
1983<\/div><\/td>
76.2<\/div><\/td>
101.6<\/div><\/td>
146.05<\/div><\/td>
25.4<\/div><\/td>
Industry standard, most common form factor for PC hard disks<\/div><\/td><\/tr>
3.5\u2033<\/div><\/td>
Low-Profile<\/div><\/td>
1983<\/div><\/td>
95<\/div><\/td>
101.6<\/div><\/td>
146.05<\/div><\/td>
25.4<\/div><\/td>
Industry standard, most common form factor for PC hard disks<\/div><\/td><\/tr>
2.5\u2033<\/div><\/td>
19 mm Height<\/div><\/td>
1988<\/div><\/td>
63.5<\/div><\/td>
69.85<\/div><\/td>
100.08<\/div><\/td>
19.05<\/div><\/td>
Highest-capacity 2.5\u2033 drives, used in full-featured laptop systems<\/div><\/td><\/tr>
2.5\u2033<\/div><\/td>
17 mm Height<\/div><\/td>
1988<\/div><\/td>
63.5<\/div><\/td>
69.85<\/div><\/td>
100.08<\/div><\/td>
17.02<\/div><\/td>
Mid-range capacity drives used in some laptop systems<\/div><\/td><\/tr>
2.5\u2033<\/div><\/td>
12.5 mm Height<\/div><\/td>
1988<\/div><\/td>
63.5<\/div><\/td>
69.85<\/div><\/td>
100.08<\/div><\/td>
12.45<\/div><\/td>
Low-capacity drives used in small laptops (subnotebooks)<\/div><\/td><\/tr>
2.5\u2033<\/div><\/td>
9.5 mm Height<\/div><\/td>
1988<\/div><\/td>
63.5<\/div><\/td>
69.85<\/div><\/td>
100.08<\/div><\/td>
9.4<\/div><\/td>
Lowest-capacity drives used in very small laptops (mini-subnotebooks)<\/div><\/td><\/tr>
PC Card<\/div><\/td>
Type I<\/div><\/td>
1990<\/div><\/td>
45.72<\/div><\/td>
54.1<\/div><\/td>
85.6<\/div><\/td>
3.3<\/div><\/td>
Not used for hard disks<\/div><\/td><\/tr>
PC Card<\/div><\/td>
Type II<\/div><\/td>
1990<\/div><\/td>
45.72<\/div><\/td>
54.1<\/div><\/td>
85.6<\/div><\/td>
5.08<\/div><\/td>
Smaller-capacity expansion hard disks for laptops and consumer electronics<\/div><\/td><\/tr>
PC Card<\/div><\/td>
Type III<\/div><\/td>
1990<\/div><\/td>
45.72<\/div><\/td>
54.1<\/div><\/td>
85.6<\/div><\/td>
10.41<\/div><\/td>
Higher-capacity expansion hard disks for laptops<\/div><\/td><\/tr>
Compact<\/div><\/td>
Type I<\/div><\/td>
1994<\/div><\/td>
25.4<\/div><\/td>
42.93<\/div><\/td>
36.07<\/div><\/td>
3.3<\/div><\/td>
Smaller-capacity flash cards for digital cameras, hand-held computers and consumer electronics; not used for hard disks (yet)<\/div><\/td><\/tr>
Compact<\/div><\/td>
Type II<\/div><\/td>
1994<\/div><\/td>
25.4<\/div><\/td>
42.93<\/div><\/td>
36.07<\/div><\/td>
5.08<\/div><\/td>
Larger-capacity flash cards and hard disks for digital cameras, hand-held computers and consumer electronics<\/div><\/td><\/tr>
SmartMedia<\/div><\/td>
Standard<\/div><\/td>
1995<\/div><\/td>
<\/div><\/td>
37<\/div><\/td>
45<\/div><\/td>
0.76<\/div><\/td>
SmartMedia \/ SSFDC flash memory card; very thin removable flash format widely used in digital cameras, including Olympus and Fujifilm<\/div><\/td><\/tr>
Miniature Card<\/div><\/td>
Standard<\/div><\/td>
1995<\/div><\/td>
<\/div><\/td>
37<\/div><\/td>
45<\/div><\/td>
3.5<\/div><\/td>
Intel Miniature Card \/ MiniCard; obsolete flash or SRAM card format used in PDAs, digital cameras, voice recorders and other portable devices<\/div><\/td><\/tr>
MMC<\/div><\/td>
Standard<\/div><\/td>
1997<\/div><\/td>
<\/div><\/td>
24<\/div><\/td>
32<\/div><\/td>
1.4<\/div><\/td>
Original MultiMediaCard removable flash memory card; later MMC variants retained this physical form factor<\/div><\/td><\/tr>
Memory Stick<\/div><\/td>
Standard<\/div><\/td>
1998<\/div><\/td>
<\/div><\/td>
21.5<\/div><\/td>
50<\/div><\/td>
2.8<\/div><\/td>
Original Sony Memory Stick physical form factor; also used by full-size Memory Stick PRO variants<\/div><\/td><\/tr>
SD<\/div><\/td>
(Secure data)<\/div><\/td>
2001<\/div><\/td>
<\/div><\/td>
24<\/div><\/td>
32<\/div><\/td>
2.1<\/div><\/td>
Digital cameras, MP3 players and many other devices. Available in various capacities, standard SD has 9 contacts<\/div><\/td><\/tr>
Memory Stick<\/div><\/td>
Duo<\/div><\/td>
2002<\/div><\/td>
<\/div><\/td>
20<\/div><\/td>
31<\/div><\/td>
1.6<\/div><\/td>
Sony Memory Stick Duo physical form factor; used by Memory Stick Duo, PRO Duo and PRO-HG Duo variants<\/div><\/td><\/tr>
xD-Picture<\/div><\/td>
Standard<\/div><\/td>
2002<\/div><\/td>
<\/div><\/td>
20<\/div><\/td>
25<\/div><\/td>
1.7<\/div><\/td>
xD-Picture Card; compact flash memory format developed by Olympus and Fujifilm, principally for digital cameras<\/div><\/td><\/tr>
SD<\/div><\/td>
Mini SD<\/div><\/td>
2003<\/div><\/td>
<\/div><\/td>
21.5<\/div><\/td>
20<\/div><\/td>
1.4<\/div><\/td>
Mini SD card has 11 contacts<\/div><\/td><\/tr>
MMC<\/div><\/td>
RS-MMC<\/div><\/td>
2004<\/div><\/td>
<\/div><\/td>
24<\/div><\/td>
18<\/div><\/td>
1.4<\/div><\/td>
Reduced-Size MultiMediaCard; smaller MMC form factor used in mobile phones and compact devices; includes physically compatible MMCmobile variants<\/div><\/td><\/tr>
SD<\/div><\/td>
Micro SD<\/div><\/td>
2005<\/div><\/td>
<\/div><\/td>
11<\/div><\/td>
15<\/div><\/td>
1<\/div><\/td>
MicroSD card has 8 contacts<\/div><\/td><\/tr>
SD<\/div><\/td>
TF (Trans Flash)<\/div><\/td>
2005<\/div><\/td>
<\/div><\/td>
11<\/div><\/td>
15<\/div><\/td>
1<\/div><\/td>
TF card has 8 contacts<\/div><\/td><\/tr>
MMC<\/div><\/td>
MMCmicro<\/div><\/td>
2005<\/div><\/td>
<\/div><\/td>
12<\/div><\/td>
14<\/div><\/td>
1.1<\/div><\/td>
MMCmicro miniature MMC form factor developed primarily for mobile phones and other very small devices<\/div><\/td><\/tr>
Memory Stick<\/div><\/td>
Micro (M2)<\/div><\/td>
2006<\/div><\/td>
<\/div><\/td>
12.5<\/div><\/td>
15<\/div><\/td>
1.2<\/div><\/td>
Sony\/SanDisk Memory Stick Micro (M2); compact form factor primarily used in mobile phones and other small devices<\/div><\/td><\/tr>
M.2<\/div><\/td>
2230<\/div><\/td>
2013<\/div><\/td>
<\/div><\/td>
22<\/div><\/td>
30<\/div><\/td>
<\/div><\/td>
M.2 SSD module, 22 mm x 30 mm; commonly used in compact laptops, tablets and handheld systems<\/div><\/td><\/tr>
M.2<\/div><\/td>
2242<\/div><\/td>
2013<\/div><\/td>
<\/div><\/td>
22<\/div><\/td>
42<\/div><\/td>
<\/div><\/td>
M.2 SSD module, 22 mm x 42 mm; compact systems and some laptops<\/div><\/td><\/tr>
M.2<\/div><\/td>
2260<\/div><\/td>
2013<\/div><\/td>
<\/div><\/td>
22<\/div><\/td>
60<\/div><\/td>
<\/div><\/td>
M.2 SSD module, 22 mm x 60 mm; less common, used in some older and specialised systems<\/div><\/td><\/tr>
M.2<\/div><\/td>
2280<\/div><\/td>
2013<\/div><\/td>
<\/div><\/td>
22<\/div><\/td>
80<\/div><\/td>
<\/div><\/td>
M.2 SSD module, 22 mm x 80 mm; most common M.2 SSD size for desktop and laptop systems<\/div><\/td><\/tr>
M.2<\/div><\/td>
22110<\/div><\/td>
2013<\/div><\/td>
<\/div><\/td>
22<\/div><\/td>
110<\/div><\/td>
<\/div><\/td>
M.2 SSD module, 22 mm x 110 mm; commonly used for enterprise, workstation and server SSDs<\/div><\/td><\/tr>
CFexpress<\/div><\/td>
Type B<\/div><\/td>
2019<\/div><\/td>
<\/div><\/td>
29.6<\/div><\/td>
38.5<\/div><\/td>
3.8<\/div><\/td>
CFexpress Type B removable flash memory card; PCIe x2; NVMe; same physical form factor as XQD<\/div><\/td><\/tr>
CFexpress<\/div><\/td>
Type A<\/div><\/td>
2020<\/div><\/td>
<\/div><\/td>
20<\/div><\/td>
28<\/div><\/td>
2.8<\/div><\/td>
CFexpress Type A removable flash memory card; PCIe x1; NVMe; compact form factor<\/div><\/td><\/tr>
CFexpress<\/div><\/td>
Type C<\/div><\/td>
<\/div><\/td>
<\/div><\/td>
54<\/div><\/td>
74<\/div><\/td>
4.8<\/div><\/td>
CFexpress Type C removable flash memory card; PCIe x4; NVMe; largest CFexpress form factor<\/div><\/td><\/tr><\/tbody><\/table><\/div>\n
\n

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The following table lists various hard disk and SSD form-factors and gives their actual size in millimetres. 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