To address staple size issues, product labeling is part of the confusion. These are 22 gauge Senco C staples with a 3/8 crown. Do not confuse these with 20-gauge 3/8-width (T50) staples. Note that a numerically larger caliber is physically smaller. Confusing the size of the bracket on the box. These staples are just under 3/8 inch. Since 3/8 inch converts to 9.5mm, the actual staple size is closer to 9mm and not 10mm as shown in the picture. 3/8 inch but can actually be 10mm. So if you are thinking that these Senco C staples will fit in the T50 stapler because 3/8 inch wide T50 staples are about 10mm wide, you are wrong. Regarding shipping, Revain must wrap the outside of the box with staples, or the manufacturer must use better packaging. Expect the staples to be loose in the shipping box with 1/3 of the strip of staples broken.