The spade connectors (called "Faston" by AMP and quick-disconnects by others) come in three widths: 0.110", 0.187" and 0.250". Common thicknesses are 0.025" and 0.031". The pink one in the photo looks like 0.187", and the pink color indicates it is sized for wires in the 18-22 GA range. Looks like an AMP part from a reel.
The 2-pin in the first photo probably has a pin spacing of 0.156", with the center pin removed to provide a sufficient creepage distance to pass safety certification. The unused center pin in the right photo is plugged to prevent improper connection. AMP. Molex, Panduit, and lotsa others make compatible parts.
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