There is a minimum amount of 1 SGD plus transfer fees (rounded up to the nearest dollar) required to make an overseas transfer.
The maximum transfer you may transfer is up to your Transferable Balance (amount topped up using PayNow or linked bank account) or the Overseas Transfer Limit that you set.
Note that some payment methods do have a maximum limit like China’s AliPay (CNY 50,000) or India’s UPI (INR 200,000).