Everything about this is wrong.

• Graboids are the smallest, maxing out at 10 meters in length.
• The Sarlaac pit is just the mouth. The actual Sarlaac is 100 meters long
• The Beetlejuice Sandworm has a head slightly larger than an average door, so about 1 meter wide.
• Shai Hulud get up to 1000 meters in length (pre-Brian Herbert Lore) and around 40-50 meters wide.