How are softgel capsule sizes sorted?

Softgel capsule sizes are primarily sorted by volume size. This classification method is essential because the volume directly correlates with the amount of fill material the capsule can hold, which is crucial for determining the dosage per capsule. Volume is a key factor in ensuring the correct delivery of active pharmaceutical ingredients, as different formulations may require specific amounts to achieve the desired therapeutic effect.

Although diameter, shape, and color may be relevant in describing the physical characteristics of softgels, they are not standardized methods for sorting capsule sizes in relation to their functional purposes in pharmaceuticals. Volume size is the most relevant criterion for dosage requirements and efficacy in medication delivery.