The biggest one I know of is this one:
It is sold in various places, under various names.
To get anything bigger than that, I think you'd have to get it custom made.
Didn’t manage to find it on the hismith store. I ordered it at amazon germany.
The final bulge is a sensation!
10" Monster Silicone Realistic Dildo with Dual Density Anal Dildo Huge Suction Cup Dildo Big Horse Dildo Giant Anal Toy Anal Plugs Large Strap On Dragon Thick Dildo Sex Toys for Her https://www.amazon.com/dp/B081ZTKK1W/ref=cm_sw_r_cp_api_glt_i_2P28NW7BFJXARMTYGGG1?_encoding=UTF8&psc=1
Mine is a large with medium firmness. Ib highly recommended getting a different cum lube than what it provided. My favorite is spunk from Amazon.
10" Monster Silicone Realistic Dildo with Dual Density Anal Dildo Huge Suction Cup Dildo Big Horse Dildo Giant Anal Toy Anal Plugs Large Strap On Dragon Thick Dildo Sex Toys for Her
Thank you, I found it with your information. Called the bunker buster
Doc Johnson American Bombshell - Bunker Buster - Dildo or Butt Plug with Suction Cup - Gunmetal Grey https://www.amazon.ca/dp/B00C2H0LN0/ref=cm_sw_r_apan_glt_i_AMMBNNK78S0R944AAQ8Q?_encoding=UTF8&psc=1
:) Multi Color Soft Flexible Animal Dildo Horse Dildo Silicone Dildo Dick Adult Sex Toy for Women with Suction (Red+Black) https://www.amazon.com/dp/B08GFNK9BW/ref=cm_sw_r_cp_api_glt_fabc_VW1PDRS37MY5G3TDB24A?_encoding=UTF8&psc=1
Rockingtail Bath Stool Elastic Weightless Chair Positions Assistance Stool Height Adjustable Portable Furniture with Handle and Bracelet Set for Couple https://www.amazon.com/dp/B09FYY6DFY/ref=cm_sw_r_apan_glt_fabc_KJ4V1XZCPN99JSFW32N8?psc=1
This was a good start, which finally led me to finding the actual toy. I did a major deep dive and did a comparison and based on the veins and suction cup differences I can confirm this is the toy. Thanks for your help.
I have the same problem too, I recently worked up to this "forearm" dildo. I was disappointed when I looked back at the pics and had no gape haha. But love your hungry asshole I would eat it for days.