The phrase "a combination of sizes" is correct and usable in written English.
You can use it when referring to a selection or assortment that includes different dimensions or measurements.
Example: "The store offers a combination of sizes for their clothing line, ensuring that everyone can find the perfect fit."
Alternatives: "a mix of sizes" or "a variety of sizes".
What I think we're seeing now is a combination of size and intensity — ecological momentum, if you will.
Most were fairly skeptical that New York would supplant or match Palo Alto, which blossomed as a startup capital thanks to a combination of size, culture and serendipity.
Will played American football while at Harvard and is still a combination of size and speed.
It has a combination of size, performance, ruggedness and value that the market hasn't seen before," said Jerker Hellström, CEO and Chairman of the Handheld Group.
A combination of size and superior manufacturing processes create a low cost structure, representing competitive advantages for both the production unit and downstream businesses.
A combination of size-dependent absorption cross-section and saturation effects in these NCs has a profound effect on the measured PL spectrum.
The innovative scaling strategies proposed in this article include a combination of sizing-up, equaling-up and numbering-up in three main pathways.
The molar mass and molar mass distribution of particular components of a polymer mixture can be determined by a combination of size exclusion chromatography (s.e.c).e.c
However, the purification of bacteriocin like antimicrobial peptide in this study was achieved by a combination of size exclusion, affinity and reversed phase chromatography techniques as described previously (Singh et al. 2012).
The relation between the initial PE molecular weight (MW) and the structure of the compatibilizer copolymer is studied by a combination of size exclusion chromatography and Fourier transform infrared spectroscopy.
