4.54 Inch Diameter XXXL Huge Thick Dildo,10 Inch Super Girthy Silicone Dildo with Strong Suction Cup, Extra Wide Anal Dildo for Hands-Free Play, Giant Fat Dildo Butt Plug for Advanced Women Men Gay

As others have said, glass isn’t ideal for sizing up (though it’s great for holding a max gape). Find a silicon toy that allows you to stretch from where you are, up, but with some give - like this. This helped me go from 2.5 to over 3 when I didn’t think I could - it wasn’t a “relax more” thing, it was gradual work, but this allowed it to be slower, more comfortable and more controlled gradient. Lube & patience.