M&S Wedding cake help

We have now decided that we are having a M&S wedding cake, http://www.marksandspencer.com/Marks-and-Spencer-Traditional-Wedding/dp/B0015ZHXX6 three of these teirs in white sponge

So, Im thinking of buying a cake stand to hold the three tiers, will any stand do or do I need to measure the teirs and all that?

And decoration, Im hoping to do it as cheap as possible, with navy ribbon round the bottom edge of each tier. But what can I get for the top? We do have a butterfly theme if that helps?

Thanks girls!

x x

Hello

Gary's cousin had your cake at her wedding it was lovely! she just bought a three tiered stand off ebay don't think she measured it.

This ebay seller has loads of butterfly toppers which look lovely (you wouldn't guess i use ebay alot)

http://stores.shop.ebay.co.uk/sarahs-cake-creations__W0QQ_armrsZ1QQ_fsubZ1572451014

I think this one is sweet

http://cgi.ebay.co.uk/glass-crystal-blue-butterfly-cake-topper-decoration_W0QQitemZ150419242616QQcmdZViewItemQQptZUk_Crafts_Cake_Decorating_MJ?hash=item2305af7e78

Im not sure about those toppers, maybe a bit too girly for me! lol

I do like http://cgi.ebay.co.uk/BUTTERFLY-SET-WEDDING-PARTY-CAKE-STAND-TOPPER-TOPPERS_W0QQitemZ110519199354QQcmdZViewItemQQptZUk_Crafts_Cake_Decorating_MJ?hash=item19bb75267a though, but h2b has just informed me he wants flowers and a quaich so it looks a bit more like

x