European leaders are weighing the creation of a 40-kilometer buffer zone between the Russian and Ukrainian frontlines as part of a peace deal, reports Politico.

The proposal, according to five European diplomats, is among several that military and civilian officials are considering for either a postwar or ceasefire scenario in Ukraine.

Officials disagree how deep the actual zone could be, but Politico notes a width of 40 km.

European diplomats have stayed away from likening it to the heavily guarded divide between North and South Korea, which are technically still fighting. They compare it more to the division of Germany during the Cold War.

The number of servicemembers needed to patrol the border also remains a concern. Officials are discussing from 4,000 to around 60,000 troops. 

Also, it is unclear Ukraine would accept the plan as it would likely come with territorial concessions.

The US does not appear to be involved in the buffer zone discussions.