Here are the sizes and the specifications of the chipsinks:

ChipsinkROW Microcool Chipsink  Review

Names
South Sink PLL Sink MOSFET Sink Micro Sink
Dimensions
30(L)x30(W)x30(H) mm15(L)x12(W)x18(H) mm12(L)x12(W)x18(H) mm8,5(L)x8,5(W)x8(H) mm
Material
Extruded Alluminum 6063Extruded Alluminum 6063Extruded Alluminum 6063Extruded Alluminum 6063
Coating
Anodized AlluminumAnodized AlluminumAnodized AlluminumAnodized Alluminum
Adhesive
Chomerics T405 Thermal Interface PadChomerics T405 Thermal Interface PadChomerics T405 Thermal Interface PadChomerics T405 Thermal Interface Pad
Weight
30g5g4g1g
Function
Cooling SouthBridge Cooling PLL Cooling MOSFET
Cooling mini MOSFET

Underneath the thermal pad, the finish on the bottom of these heatsinks are quite smooth and surprisingly a lot smoother than most ramsinks on the market.

Finish Microcool Chipsink  Review

Here is a closer look at the individual heatsinks :

Southsink:

Southsink1 Microcool Chipsink  Review

PLL Sink:

PLLSink1 Microcool Chipsink  Review

MOSFET Sink:

MosfetSink1 Microcool Chipsink  Review

Micro Sink:

MicroSink1 Microcool Chipsink  Review