Based on the available information, the Silver Lake-SW boat ramp is a public boat launch located in Oceana County, Michigan. It provides access to Silver Lake, which covers an area of 690 acres. The coordinates of the boat ramp are 43.65958023 latitude and -86.51291656 longitude.

The width of the boat ramp is not specified in the available information, but it is likely to be suitable for launching a range of vessel sizes. The ramp is open to a variety of watercraft, including motorboats, pontoons, jet skis, kayaks, and canoes.

It is important to note that the information provided may not be up-to-date or complete. Therefore, it is recommended to check with local authorities or other reliable sources for the latest information about the Silver Lake-SW boat ramp and its facilities.