The Baggies currently sit 14th on the Premier League table, just four points above the drop zone, but Irish striker Long is of the belief that the West Midlands outfit already have a squad capable of staving off relegation and moving up the standings.
"We don't need freshening up," Long told the Birmingham Mail following an unbeaten streak of four matches.
"We have near enough 25 players. We have six or seven options up front. We're covered everywhere. (Former boss) Steve Clarke did well, he brought in good options.
"I think we're good enough to get into that top half of the table - hopefully get some points over the next games and get back up there.
"We're optimistic of staying up. We're definitely good enough. We have a big squad, with lots of competition for places.
"We've had a good Christmas period. We have got to take confidence from that."
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