Typical dimensions for different hard drive types, broken down by form factor:
List of hard-drive dimensions
2.5-inch Hard Drives (HDD and SSD)
- Width: 69.85 mm (2.75 inches)
- Height: Varies between 7 mm, 9.5 mm, 12.5 mm, and 15 mm
- Depth (Length): 100 mm (3.94 inches)
2.5-inch drives are often used in laptops, some desktops, and external storage devices. The thickness can vary depending on the capacity.
3.5-inch Hard Drives (HDD)
- Width: 101.6 mm (4 inches)
- Height: 25.4 mm (1 inch)
- Depth (Length): 147 mm (5.79 inches)
These drives are most commonly found in desktop computers and larger external storage systems.
M.2 SSD (2280 standard)
- Width: 22 mm
- Height: Typically 3.5 mm or less (varies slightly depending on the components)
- Length: 80 mm (standard is 80 mm, but can also be 30 mm, 42 mm, 60 mm, or 110 mm)
M.2 drives come in different sizes but the most common is the 2280 standard (22 mm wide and 80 mm long). They are used in modern laptops and desktops for fast, compact storage.
U.2 (formerly SFF-8639) SSD
- Width: 69.85 mm (2.75 inches)
- Height: 7-15 mm (similar to 2.5-inch SSDs)
- Depth: 100 mm (3.94 inches)
U.2 drives are typically used in enterprise storage environments.
NVMe SSD (Non-M.2 form factor)
There are a variety of NVMe SSD sizes depending on their use case (like PCIe add-in cards, for example), but most NVMe drives follow the M.2 or U.2 dimensions listed above.