Malaysian Trumpet Snails have elongated shells that resemble a sugar cone. The shells appear to grow in rings as they swirl up from the apex. Shells can be solid or have patterns with colors ranging from brown, grey and creamy-white. Malaysian Trumpet Snails start life very small. Under the right conditions they can grow to about an inch in length from apex to aperture. At their widest point, their shells can be about the diameter of a pencil eraser. Malaysian Trumpet Snails need Calcium for healthy shell growth, so make sure calcium is available in their diets.