The tacks are short, about 1/8" long, and will prick and scratch the skin like little thorns, but will not pierce the skin unless you squeeze or slap it very firmly.
The gloves can also be used very lightly, and can stimulate the skin in dozens of distinct little points without actually hurting at all. Some people might find the sensation rather intense, perhaps in a ticklish way.
To determine your glove size follow these directions.
1. Measure around the hand at the fullest part. (not including the thumb)
2. Measure from the tip of the middle finger to the base of the hand.
3. Use the LARGEST of the two measurements for the correct glove size.
4. If you are RIGHT handed, take measurements from your RIGHT hand, if you are LEFT handed, take measurements from your LEFT hand.
Note: This item does not come with brand packaging. This item is shipped in a clear ziplock bag with bubble wrap to protect the gloves.
SKU: J415 (X-Small) - 7 1/2"
SKU: J144 (Small) - 8 1/2"
SKU: J145 (Medium) - 9 1/2"
SKU: J114 (Large) - 10 1/2"
SKU: J116 (X-Large) - 11 1/2"