TEABLOOMModern Insulated Tasting Glass Cups - Set of 2 Double Walled Glasses (10 oz / 300 ml) - Milano Collection

What is the width of the bottom of the cups? I need to know for cup holder

How tall are these?

Do these glasses actually hold 10 oz of liquid? Is the 10 oz up to the very top? I ordered a similar cup and it actually only holds 8 oz.