ALL of the yarns are LACE WEIGHT.

All of the yarns are listed using the cotton system: 
        cotton count/plies 
where the cotton count is 840 yards per pound for a count of 1. 
The higher the count, the thinner the yarn. 
Example: 10/2 cotton 
10 is the count; multiply by 840. 
        10 x 840 = 8400 yards per pound 
Divide by 2 plies to get 4200 yards per pound 
 
 Wraps per inch (wpi) is a measurement helpful to both weavers and knitters. Wrap your yarn around a ruler for an inch and count the number of wraps. This is the same as yarn diameters per inch and is an estimate of the yarn thickness. Again, the higher the number, the thinner the yarn. 

Spin Off magazine gives the following table: 
 

Picture: 10/2 cotton, 40 wraps per inch