Re: Ring Sling-- best uses
The "5,20m" you are seeing means that the girasol wrap/ sling is 5.2 meters long. European /non-US websites often use the word "sling" for wraps as well as ring slings. Also, Europeans use commas as decimal points (rather than periods).
So what you were looking at on the girasol site was a very long wrap, not a ring sling. Ring slings will typically come in sizes like Medium, Large, etc. or else would be around 2 meters long.