What is the best way to choose a TV wall mount?

1. Make sure your TV's VESA is less than 400mm x 400mm;
2. Make sure your TV weighs less than 77 pounds;
3. Just make sure your TV is 32-60 inches if you don't want to do these things.

Features:

HDTV that supports most 32"-60" flat TVs (32"36"37"42"43"46"47"49"50"52"55"60").
The range of motion is 180° from left to right.
It is easy and convenient to level work with Bubble Level.
The steel construction supports a load capacity of 77 pounds.
A safety screw secures the TV to the wall bracket and prevents it from moving.
Mounting holes are 400mm x 400mm maximum.
400x400/400x300/400x200/300x300/300x200/200x100mm/150x150mm/100x100mm

Specifications:

-10/+10° tilt
180° swivel
180° rotation
Cold Commercial Steel Plate
Black color.
The load capacity of this unit is 77 pounds/35 kilograms
Using Bubble Levels
Adjustable from 2.8 to 17 inches from TV to wall
Compliant with VESA:
(16"x16") 400mm x 400mm           
The dimensions are 400 x 300 mm (16" x 12").           
Approximately 400 mm x 200 mm (16" x 8")
Approximately 300 mm x 300 mm (12" x 12")
Dimensions: 300 x 200 mm (12 x 8 inches)
(8"x8") 200mm x 200mm    
8"x6" - 200mm x 150mm      
Approximately 200mm by 100mm (8" x 4").
Approximately 150 mm x 150 mm (6" x 6").
(4"x4") 100mm x 100mm
..and much more...

Package Includes:

TV Mount Bracket with Full Motion
A bubble level
Manual for assembly
A complete set of screws and other fittings is required for assembly