Dish size for a 4-person lasagne?

[Spaulding]

I made lasagne for the first time the other day and when it came to assembling the dried lasagne sheets, my teeny dish would only fit one and a half sheets (with the half cut lengthways), which caused a complete mess trying to half dried pasta and it was a faff! However, the lasagne was a success so I'd like to make it again, so I was just wondering if any of you had recommendations for a dish that would fit enough lasagne to feed 4 people?

Ideally, you need something about 30cm x 25cm which fits three typical lasagne sheets side by side and leaves enough room for expansion. This [http://www.argos.co.uk/static/Product/partNumber/8614182.htm Argos dish]] is about the right size.

link

Thanks Cogito! Bargain price too!