Eisco Labs 3/4 Inch Plastic Marbles - Pack of 5 - Science Classroom Supplies, DIY Crafts & Kids Educational Toys

I bought these for several marble launchers for which the marbles have gone missing. I measured the barrel of the launchers and decided that a 3/4" marble would fit perfectly. I found these and bought them. Yay me! When they arrived I tried them in the marble launcher only to discover they do not fit. After then taking out my micrometer and measuring them I discovered they were in fact closer to 13/16" than 3/4". I feel that these marbles are now nothing but a reminder of the deceitful nature of humanity. Kudos marble people. You have successfully peddled your lies.