can you remove the side protection

Yes, easy and simple! Only need two hands and a tiny phillips head screwdriver ("Eyeglasses screwdriver", PH000, PH00, 1.0, 1.5) 1.) Open both arms of glasses 2.) On one arm, remove little phillips screw on inside of arm, and save for later (near your temple, the one securing the sideshield) 3.) Fold this arm in to body 4.) With one hand, grip arm where lettering is (with arm still folded in to body, so that sideshield can slide out) 5.) With other hand, grip sideshield 6.) Pull the arm and sideshield away from each other, while wiggling the sideshield until they seperate. (The first time will be harder, but keep pulling and wiggling and increasing pressure until they come apart) 7.) Repeat steps 2 - 6 on other arm 8.) Put screws back into seperated sideshields and store for later use

What are the dimensions? Will they fit someone with a big head?

They fit comfortably on my head and I have quite a large head myself, they also are rubberized inside which should cushion any discomfort.

Yes. These glasses have an anti-fog coating.

Ms z87+ what’s ms stand for? why it says ms instead of ansi?

Hello - Thank you for your inquiry. The "MS" stands for Magid Safety, the marking requirements of the ANSI Z87 standard require the manufacturers Identification.

ASIN	B07253G22T
ASIN	B07253G22T
Age Range Description	Adult
Amazon Bestseller	#144,972 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #1,124 in Safety Glasses
Brand Name	MAGID
Color	clear
Customer Reviews	4.6 4.6 out of 5 stars (11,932)
Date First Available	October 28, 2017
Fit Type	Standard
Frame Material	Nylon
Frame Type	Full Rim
Is Discontinued By Manufacturer	No
Item Dimensions	14 x 15.2 x 5.1 cm
Item Package Quantity	1
Item Weight	0.04 Kilograms
Item model number	Y50BKAFC
Lens Coating	Anti-Fog Coating
Lens Color	Clear
Pattern	Solid
Product Dimensions	13.97 x 15.24 x 5.08 cm; 40 g
Size	6x5.5x2インチ
Special Features	Lightweight
Sport Type	Outdoor Lifestyle
Style	Classic
Style Number	Y50BKAFC
Ultraviolet Light Protection	TRUE
Unit Count	1.0 Count

Magid Safety Y50BKAFC Safety Glasses | Classic Hard Coated Safety Glasses with Mouse Black Frame, Clear Lens and Permanent Side Shields - Stylish Design, Anti-Fog Coating, UV Protection (1 Pair)

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