Your basic SOIC break out boards. What's the difference? The 8 Pin board is TINY. And you can't beat the price! These are custom PCB boards that interface standard SOIC devices to standard .1" headers.

8-SOIC: Standard .3" spacing between pins. Will fit directly into a slim (300 mil) DIP socket. For slim ICs (memories, 74s, etc).
Dimensions: 0.5x.78"

40 Pin break-away headers are perfect for use with these custom PCBs. Machine pin headers may be a better option for IC sockets.