Specifying size in HTTP URL Request of Elastic Search

Hi,

Can anyone please suggest me on this problem.I'm trying to get the data from index based on HTTP URL.I have 100 records in index.By default,it is displaying 10.

So,if I specify size=20 means,it is displaying first 20 records.Is there any way to get the data specifying range..Such as to get 1 to 20 records from index,40 to 50 records from index..In this manner..Is it possibl through HTTP URL Request.Can you please suggest me regarding this.pleaseeeee

Thanks
krrish