Spreads fluctuate according to real-time market conditions. Generally, the range of spreads is quite stable, however it may broaden due to insufficient liquidity. For the actual spread data, please refer to the product specification in the MT4 trading software.
You can launch your MetaTrader4 software, move the cursor to the "Market Watch" window, right-click and select "Spread" to view all trading products' real time spreads.