"Russian Rouble/Euro FX Cross Rate
This may just mean that Russian men can't buy their Kelvin Kline underpants any more. The lack of SWIFT interbank messaging means it can make it more difficult to buy them. Not all Russian banks are going to be blocked though - that is what has been said.
Kelvin Kine - a daft example read imports also some exports. The export aspect is likely to hit all of us - inflation and quantities available. The top end of all governments are well aware of that so the nature of an eventual solution might surprise people but if things go that way Russia may do the same again. Some other way.