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View Hamilton's needle gauge chart. Hamilton's guide to selecting a syringe needle gauge will help you find the proper Hamilton needles. Select the minimum needle length that allows you to carry out your application comfortably.
Below, you will learn the recommended needle gauges for different types of injections and get an overview of available needle gauges with their corresponding colors, outer diameters, and uses (+ downloadable size chart).
Needle gauge size is a measure of the thickness of the needle. The higher the gauge size, the thinner the needle. Needles are available in a range of sizes, from the thinnest (typically around 30 gauge) to the thickest (usually around 13 gauge).
You'll see milliliters (mL) marked on the tube for measuring liquids. You'll see cubic centimeters (ccs) for measuring solids. It's best to choose a syringe that holds the exact dose you need. Needles are measured differently. The first number on a needle label is its gauge—how thick the needle is.
Below is a phlebotomy needle size chart reference that outlines the different needle sizes commonly used in phlebotomy practice: 20 Gauge - This needle size is commonly used for routine venipuncture and blood donation. It is ideal for drawing blood from adult patients with normal veins.
Needle lengths range from 3/8 of an inch to 3.5 inches. A subcutaneous injection needs a relatively short needle. This is because the medication is delivered just under the skin. An intramuscular (IM) injection needs a longer needle because the medication is delivered into the muscle.
The size of a phlebotomy needle is determined by two main factors: Gauge: The gauge of a needle refers to its diameter. The higher the gauge number, the thinner the needle. Common gauges for phlebotomy needles range from 16 to 22, with 16 being the thickest and 22 being the thinnest.