[Home](./index.md) > [server](./server.md) > [ParticleEmitter](./server.particleemitter.md) > [sizeStartVariance](./server.particleemitter.sizestartvariance.md) ## ParticleEmitter.sizeStartVariance property The size variance at the start of an emitted particle's lifetime. **Signature:** ```typescript get sizeStartVariance(): number | undefined; ```