The most popular size in global is #0, for example, if the specific gravity is 1g/cc, the filling capacity is 680mg.  If the specific gravity is 0.8g/cc, the filling capacity is 544mg.  Best filling capacity requires suitable capsule size in order to perform smoothly during filling process. If filling too much powder, it will let capsule become un-locked situation and content leakage.  Normally, many health foods contain compound powders, so their particles have different sizes.  Therefore, choosing specific gravity at 0.8g/cc as a filling capacity standard is much safer.  The Capsule Filling Capacity table is shown as below.  Size #000 is our largest capsule and its filling capacity is 1.35ml.  Size #4 is our smallest capsule and its filling capacity is 0.21ml.  The filling capacity for different size of capsules is depends on the density of capsule contents.  When the density is bigger and the powder is finer, the filling capacity is larger.  When the density is smaller and the powder is bigger, filling capacity is smaller.HPMC capsules are manufactured from Hydroxypropyl Methylcellulose and is globally referred to also as “Hypromellose”. HPMC is derived from plant cellulose and was one of the first alternatives available for vegetarians. Hydroxypropyl Methylcellulose rose to popularity in the early 2000s as it proved to be a stable polymer with a low moisture content that makes it suitable for moisture-sensitive ingredients. It is also extremely resistant to higher than average heat and humidity.1.Low-moisture content ideal for Hygroscopic and moisture sensitive Ingredient. Due to the low water content (<7%) the vegetable capsules are very suitable for hygroscopic and moisture sensitive ingredients. Many natural ingredients of health food or herbal have a strong hygroscopicity which can easily absorb moisture from gelatin capsule, resulting in moisture phenomena such as agglomeration, hardens and fragmentation. 2.Excellent filling performance on full and semi-automatic machines. YQ vegetable capsules have excellent machinability on all capsule filling machines. 3.Quality Stability YQ vegetable capsules have no animal protein and fat; unfavorable for microbial breeding and quality stability. 4.Chemical Stability YQ vegetable capsules will not have an interaction with its content; chemical stability and no cross-linking reaction. 5.Allergen Free, Preservative-Free, Taste masking, BSE/TSE Free, Odorless and tasteless* NSF c-GMP, BRCGS, FDA, ISO9001, ISO14001, ISO45001, KOSHER, HALAL, DMF RegistrationMade of HPMC - Natural Vegetable Raw Materials HPMC has all written as a widely used raw material for pharmaceuticals and supplements. It complies with our customers who have a cultural or vegetarian requirement HPMC vegetable capsule is made of HPMC(Hydroxypropyl Methylcellulose), which is derived from the pine tree cellulose. HPMC is approved as “Generally Recognized as Safe” (GRAS) by the US FDA. In the US Pharmacopoeia (USP), European Pharmacopoeia (EP) and the Japanese Pharmacopoeia (JP).