I bought the dildo as a next step after a 4cm plug. As it is indicated with a diameter up to 55mm, he should deliver, too. Here is the size indicated, at least in my copy, wrong and the maximum diameter is approximately 45mm. He is unfortunately totally unsuitable for training. Now for the positives, he does not look bad, in my opinion, is made by not bad, the suction cup is quite good and if the size were true he would get probably 4 or 5 points.