If you're talking about height:

* Yes, there are volcanoes taller than Mount St. Helens. The tallest active volcano in the world is Mauna Kea in Hawaii, which is over 33,500 feet tall when measured from its base on the ocean floor. Mount St. Helens is only 8,363 feet tall.

* However, Mount St. Helens is one of the most active volcanoes in the Cascade Range, and its eruption in 1980 was one of the most powerful volcanic events in recorded history.

If you're talking about volume:

* Mount St. Helens is dwarfed by many other volcanoes in terms of volume. For example, the massive shield volcano Mauna Loa in Hawaii has a volume of over 75,000 cubic kilometers, while Mount St. Helens has a volume of only about 30 cubic kilometers.

* Volcanic eruptions can significantly change the size of a volcano, so even though a volcano may be smaller now, it could have been larger in the past.

So, the answer to your question is:

* Yes, there are volcanoes taller than Mount St. Helens.

* No, Mount St. Helens is not the largest volcano in terms of volume.

It's important to remember that "bigger" can be defined in multiple ways, and each volcano has its own unique history and characteristics.