The current minimum amount of Bitcoin that you can send in a single withdrawal from your Swan Bitcoin account is 0.0001 Bitcoin (10,000 satoshis). This is roughly ~$1 at today's prices.
We have chosen to include a minimum withdrawal limit because withdrawing even tinier amounts of Bitcoin costs us more in miner's fees, makes it more difficult for you to spend your Bitcoin, and puts you in the position to pay more transactions fees later to consolidate your Bitcoin dust.
There is no maximum withdrawal size. You can withdraw as much as you'd like.