Size of blade is 85mm, bore 15mm, 20T. The alternative blade that can fit will be from makita and work.
Not much selection for mini blades.
Info taken from web site:
Bosch Optiline Circular Saw Blade Standard for Wood 85mm x 20 th. x 15mm 2608643071
For smaller, handheld circular saws, ideal for precise quality cuts in all standard woodworking applications, both interior and exterior. This blade gives an extra thin cut with little exertion of force, especially suitable for Cordless Saws such as the Bosch GKS 10.8 V-LI.
APPLICATIONS
Ideal for rip cuts and cross cuts in softwood, hardwood, raw chipboard, MDF, formwork boards and plywood
SPECIFICATION
Outer diameter: 85 mm
Bore size: 15 mm
Width of cut: 1.1 m
Base blade thickness: 0.7 mm
Number of teeth: 20
Tooth shape: ATB
Cutting result: 3
Hook angle: 14°
Relief angle: 14°
Only drawback is cannot cut 2x4,which is 50 mm thick...