Let me copy and paste what you’re going to find in the best wiki page about climbing in Eivissa:
“…Ibiza actually offers a range of climbing on coastal crags with amazing natural beauty. The rock is predominately limestone with the exception of a few conglomerate areas. Over 450 routes have been bolted on the island ranging from 4 to 8b and covering the whole range of styles; slabs, vertical walls, steep tufa pinching, pockets … everything! The majority are single pitch 25m sport routes but there are also fully bolted multipitches and some traditional adventures to be found on the bigger cliffs…”
You also could visit this link to have more information about the climbing zones in Eivissa.
MAPS: HOW TO GET TO THE MAIN CLIMBING ZONES OF THE ISLAND FROM OUR COTTAGE (Casa des Carbó)
“An excellent sector characterised by long(er), steep endurance routes of good quality. As with all Ibizan crags, getting good conditions can be difficult especially if the wind is blowing straight off the sea (from the south-east). Take care when lowering as many routes are 30 meters. Definitely worth the visit”
“A great place to learn the art of deep water soloing. Clean falls from a maxium hight of around 10 meters”