Most tires sizes are given using the ISO Metric sizing system. Opacity is improved by optimal sizing of the titanium dioxide particles. See the separate Mesh (scale) page for details of sieve sizing. There are several recognized standards and/or public specifications for sizing software based on Function Point. There are some rules to follow while sizing the thermal mass. Accurate knitting needle and crochet hook sizing is important for both crafts. Full length and neck sizing dies are available from RCBS and Redding. However, some manufacturers use conflicting sizing methods. Capacity plays an important role in the engineering decisions about UPW system configuration and sizing. It is designed to make tire sizing consistent and clear. Scientific studies show that the current system of bra sizing may be inaccurate. Other methods include harder paper sizing and more specialized paper coatings. Units kBtu are used in building energy use tracking and heating system sizing. The paper needs high stiffness and strong wet sizing. Its fine particle sizing (nonplastic silt) and spherical particle shape enhances mix flowability.