Western Digital WD 2TB 3D NAND SATA III 2.5" Internal SSD (Retail) - Manual (Page 23)

M.2 2280 Form Factor
The M.2 2280 form factor complies with the PCI Express ™ M.2 Specification,
Revision 1.0. This specification is available at https://pcisig.com/specifications
Parameter Specifications
Type 250GB, 512GB and 1TB: M.2 2280-S2-B-M
2TB: M.2 2280-S3-B-M
Width 22 ± 0.15mm
Length 80 ± 0.15mm
Thickness (max) 2.23mm: 250GB, 512GB, 1TB
2.38mm: 2TB
Typical Weight 7g ± 1g
The figure below is enlarged to show detail, but is not the actual size of the form
factor.
Physical Specifications
WD Blue 3D NAND SATA SSD
User Manual
18