Buying insulin needles can be done without a prescription at most pharmacies and online retailers, though a prescription is typically required for insurance coverage. You can find these supplies at major retailers like Amazon.ca and Shoppers Drug Mart . Choosing the Right Needle

: Common sizes include 29G (sturdier) to 32G (thinner and more comfortable). Needle Lengths :

: Often better for leaner users and typically requires pinching the skin to ensure the insulin reaches the correct layer. Types of Insulin Supplies Comparing Insulin Pen Needles - Healthline

: Ideal for most adults; usually does not require pinching the skin. 6mm : Common size for adults; may require pinching the skin.

Needles are categorized by (thickness) and length . A higher gauge number indicates a thinner needle, which generally reduces injection pain.