Was Crocodile stronger at Marineford? Or was he holding back in Alabasta?

 During the Alabasta arc, Crocodile displayed a level of power that was initially considered overwhelming by the Straw Hat Pirates. He possessed the Logia-type Devil Fruit called the Suna Suna no Mi (Sand-Sand Fruit), which granted him the ability to control and transform into sand. He had a reputation as a Shichibukai and controlled the desert kingdom of Alabasta from the shadows. His strength was showcased through his battles with Luffy and others. At Marineford, Crocodile was present as part of the war that took place at Marine Headquarters. While he did participate in the battle, he didn't display the same level of dominance as some other powerful characters present. This has led fans to speculate that he might not have been as strong as initially portrayed in Alabasta. It's important to note that power scaling and character abilities can be subject to interpretation and development by the author. Oda often keeps details deliberately open-ended to keep the story intriguing.

What are the total dimensions in the universe?

 It is not possible to measure the total dimensions of the universe because the universe is infinite in size. The universe is everything that exists, including all matter and energy, and it has no boundaries or edges. It is impossible to measure something that has no boundaries, so it is not possible to determine the total dimensions of the universe.

The observable universe, which is the part of the universe that we can see and observe, is estimated to be about 93 billion light-years in diameter. However, this is only a tiny fraction of the total size of the universe, as there may be parts of the universe that are beyond our current ability to observe due to the finite speed of light and the expansion of the universe.

In recent years, scientists have developed theories about the structure and evolution of the universe, but much about the universe remains unknown and is the subject of ongoing scientific study.