The eye patch might fit under your glasses depending on your face shape and glasses style. The eye patch is dome shaped and doesn't touch the eyelids. The eye patch blocks about 90% of the light but will block more after wearing it for a few times because the leather will be naturally soften. The size of the eye patch 2.6"(7 cm) X 1.5" ( 3.5 cm). Elastic straps allow very easy adjustment. One item per order. This is an extremely slim version of the regular size eyepatches. This eye patch is hand crafted from 100% premium veg tan leather. It's lightweight, durable and comfortable. It's comfortable to wear and have a more sleek look. The eye patch is available for the left or right eye. If there are any issues with the item, please let me know and I will be happy to help.