A zoozone one is a much better size for a dwarf hamster
. Yes meshing the top might be necessary if you don't want to buy a new one. You can get a Ferplast Duna Multy which is the same size as the Zoozone one but has smaller bar spacing so doesn't need meshing. Miscota is the cheapest price (Amazon don't seem to be selling them at the moment) but they have some unusual payment thing where you have to pay by bank transfer or something I think.
This place are selling them at a slightly higher cost but it includes delivery
Ferplast Duna Multy Cage | Pet n Pony
Meshing is a bit of a pain but it just takes a piece of mesh and some cable ties to do it. Not that I have done it lol but plenty of people have. If you go to a diy place they will cut the mesh to the size you want (1cm square mesh) so you don't have any cutting to do. Then you just fix it on the lid with cable ties
Sealey CT25101 Cable Ties 2.5 x 100mm Pack of 100: Amazon.co.uk: DIY & Tools
I don't like diy so would probably rather fork out for a duna multy. They are great cages - I've seen them in use.
Some people even have the 100cm maxi duna multy for a dwarf hamster - it makes a great cage because there is so much space for toys and hideouts and different levels and is also futureproof as its suitable for a Syrian too. Amazon have the cheapest price at the moment £57 with free delivery
http://www.amazon.co.uk/Ferplast-Max.../dp/B00F5ZZ2R6
I've seen some great set ups of these for dwarf hamsters
Maxi Duna Multy Has Arrived!
http://www.hamstercentral.com/commun...8-post144.html
There is space for tunnels, digging areas of deep substrate and a labyrinth house as well - or even a big shoe box house if money for buying things is limited (which it usually is!).
That's the cage I would get if I had a dwarf hamster (and would quite like it for our Syrian too). The standard sized duna multy is big enough but the base curves in quite a bit so there isn't a lot of floor space for doing things with to make into a really good enriched habitat.